We've got Aliph's new Jawbone Prime in hand, and while it's not much different to look at compared to its predecessor, there's enough new on the noise reduction and ergonomics front to warrant a quick look. Follow along after the break.

It's been almost a year since Aliph last graced the Bluetooth headset world with its presence, and now it's back with the Jawbone Prime to reclaim the throne. The Jawbone Prime is only a minor update -- on the surface, anyways -- to its predecessor, and in fact the only visible change is a slightly different surface pattern and a minor indentation to denote one of the headset's two invisible buttons. Other than the quite welcome addition of Bluetooth 2.1+ EDR (multipoint connections, easy pairing), almost all the improvements under the hood have to do with the algorithm tweaks of NoiseAssassin 2.0 to improve noise reduction. It's really too bad the original isn't firmware-upgradable (we asked). The Prime will be replacing existing Jawbones at retail for the same old $130 pricetag, and comes in Blah Blah Black, Coffee Talk and Going Platinum, while an "EARCANDY" edition is available in Frankly SCARLET, 'YELLO!, Drop Me A LIME and LILAC You Mean It. Both will be available at retail on May 2nd.

Not sure what exactly was so wrong with Blah Blah Black, Silver Tongue and Goldy Lips, but for those not really turned on by any of the aforementioned hues, you should probably set your navigator to the nearest Best Buy. Aliph has just introduced two new colors in the Jawbone family -- Babbling Blue and Rambling Rosé (shown after the break) -- which will be offered up exclusively at Best Buy Mobile. Same heralded Bluetooth headset, same $139.99 price tag -- just with two new tints.

We got to spend a little bit of time with Aliph's new Jawbone headset, and we'll confess we're a tad smitten. The headset is considerably smaller than its predecessor, and the improved earbud design gave us a comfortable fit right out of the box -- with other options waiting in the wings. That old overly-complicated ear hook is gone in favor of a simple, slightly flexible one, clad in leather with the intention of an eventual worn-in feel, but thanks to the new light design we're actually planning on going hook-less -- we haven't managed to shake it off yet, and have already probably caused considerable brain damage in the attempts. The interface is the same invisible one of its predecessor, but the first time you turn it on it's in pairing mode so we had no trouble there. We'd be hard pressed to notice a sound difference either way, but that was never the original's problem. The smaller design does mean a reduction in battery life, which could be a deal breaker for some, but if you're not going to be yapping away constantly the new Jawbone is a useful bit of "earwear," as Aliph would like to call it.

Don't call it Jawbone 2, Aliph's Jawbone sequel is the company's new flagship product, with the old Bluetooth headset being put out to pasture to make way for the new hotness. The new Jawbone is 50% smaller than the original, and includes "NoiseAssassin" technology, a followup on the noise canceling tech of the original. There's a faster processor on board to handle heavier signal processing duties for canceling out ambient noises better and faster, along with that Voice Activity Sensor which lets the Jawbone know when you're talking so the rest of the time can be noise free. A new fast charge battery can suck up 80% of its capacity in 30 minutes, but the overall battery life is lower than the original, with 4 hours of talk time and 8 days of standby. The whole unit weighs in at 10 grams, and is available now for $130 at AT&T retail stores and online at Jawbone's site. Initially it's being offered in black only, but silver and rose gold (pictured after the break) versions are coming soon.

So there are a couple of big complaints about Aliph's otherwise-lauded Jawbone noise canceling Bluetooth headset: one, it's rather porky, and two, the charge connector is about as reliable as a Comcast installation appointment. Hang tight, though, because help is on the way -- help in the form of the Jawbone 2. The new model just broke through the FCC's surly bonds in full visual glory, showing a headset that maintains the distinctive industrial design of the original while getting just a bit smaller and adopting a new connector that looks moderately less sketchy. The last thing we all want to do is blow another hundred on the next best headset, but if this means we can run a teleconference standing next to a freight train traveling 40 miles per hour and do it in style, count us in.

Now's your chance to cast your ballot for the 2006 Wearable Device of the Year! Our Engadget Awards nominees are listed below, and you've got until 11.59PM EST on Sunday, April 15th to file your vote. You can only vote once, so make it count, and may the best tech win! The nominees: Aliph Jawbone Bluetooth headset, HAL-5 robotic suit, Motorola / Oakley O ROKR, Nike + iPod, Shure E500PTH, and Sony Ericsson MBW-100 Bluetooth watch.