At Macworld | iWorld 2012, Steve Sande and I had the opportunity to play with both the Adonit Jot Pro stylus and the retooled Writer 2 Plus. We left there with Jots in hand, and I was seriously considering picking up one of the cases. However, they were on pre-order and just about ready hit the market.
We've looked at the original Writer and its successor for the iPad 2. The third generation case makes a slight name change to the Writer 2 Plus -- everything good about the Writer 2, but making it better. What I found amusing is that Adonit appears to be using up its supply of second-generation Writer boxes, referring to features no longer on the Writer 2 Plus (mainly no more need for disposable batteries).
There's little change from the Adonit Writer for iPad 2. The overall design is largely the same, with power supplied by the cylindrical hinge. However, the AAA battery requirement has been dropped, replaced with a built-in rechargeable battery and a micro-USB port for charging. While it means you have to carry around another USB cable, the Writer 2 Plus has the same charging ports as the Amazon Kindle so you can carry around one cord for multiple devices. The site boasts that the keyboard holds a charge for two weeks, and so far it's held up well.
The other big change from the original Writer design is that the Bluetooth keyboard is now detachable. Give the keyboard a tug, and it comes away from the case, and it snaps back in place easily as well. Because the magnets enabling the iPad to stand are in the hinge for the keyboard, you can still prop it up without the keyboard being on the case. You can also keep the iPad in the case if you want to use it sans keyboard, but you have the hinge to deal with. It's easier to use the quick release and remove the iPad from the case.
A new addition to the Writer 2 Plus is different-colored cases. In addition to the standard black case, you can get it in red or turquoise for $10 more. I sprung for the turquoise case and love the rich color. This makes it stand out from other iPad cases, yet it's still professional in an office setting.