In the quest to continue driving down the size of cellphone handsets these days, the quest to make the tiniest (and hopefully most usable) Bluetooth headset is not far behind. Remember when the Nextlink Bluespoon was claimed to be the world's smallest Bluetooth headset? Those days are long gone and Sagem has announced that it now has the world's smallest Bluetooth headset. We better call the Guiness Book of World Records (at least for today), as the Sagem G4 claims that it "could be" the world's smallest (nice cop out), at 35 x 18 x 12.5mm -- and weighing just 8 grams as well. Performance, you ask? Sagem claims 5 hours of talktime and 100 hours of standby, and charging time is only 1.5 hours to boot. Cost? 53 British pounds, or about $103 greenbacks in U.S. currency, but right now, there's only a teaser at Sagem's website -- and it's supposed to be available some time this week.