The microphone on my Powerbook G4 is decent, but it's not quite good enough when we're trying to hold a Skypecast. Solution? The Sennheiser M 145 USB Skype Approved headset.
The headset consists of what you see above connected to two 3.5mm plugs, one for the mic input and one for the headphone output. It also comes with an adapter which attaches to those two plugs and gives turns it into a USB connection. Your choice whether you want to go USB or 3.5mm—say if you're running out of USB ports on your MacBook.
But wait, there's more!
How it feels: pretty good for a wraparound headset. The only complaint I have is the wraparound isn't adjustable, but it fits even my pumpkin sized melon, so only obscenely large and freakishly small heads will have a problem. The boom mic is also adjustable, so it'll never feel like it's in the way.
How it sounds: pretty good for a headset. There's not a whole lot of bass, but that's only noticible if you're listening to music or talking to James Earl Jones—and he's more of a Windows Live Messenger guy. The sound from talking to another Skype user and to the Skype headset were clear going in and out. It's much better than using the internal mic and only a little better than the Creative Live! Cam Voice.
Overall, the M145 is a pretty good headset if you're a Mac user and like Skype or any other online chat program. Installation was nonexistent. I plugged it in and the system immediately recognized the Sennheiser device as both input and output.
You can pick one up for around $100 online, or a few bucks less if you know where to look.
Product Page [Skype]