There are two products that I want to praise — both of which go in your ear.   

the first is the Plantronics Voyager 510SL Bluetooth headset.   this is the best Bluetooth headset i’ve ever user.   it is extremely lightweight, long talk time, good sound, and good volume.   it connects directly with my Treo 650 (and any other bluetooth compatible cell phone) and it has an adapter that connects directly with your office phone … so you only need one headset for both phones.  it is really cool.   (note that this was a Silicon Valley 100 product and I got it for free).

The second product is the new Aliph Jawbone PC Edition.   it is not out on the market yet but it is a terrific headset for travelers that want to make skype calls.   Hosain Rahman, Aliph’s CEO, gave me the product minutes before catching my plane to Chile.   it is a great product that really made my trip better (i’ve been using skype a lot when traveling internationally and the lightweight Jawbone made my travels much easier).   plus, the sound quality is really good.