The Nintendo Game Boy Advance Wireless Adapter works well enough, but the lack of titles supporting the device should give any prospective buyer pause.
With the Nyko 360 GameFace, your Xbox 360's design is open to--or limited by--your own artistry.
While the Nyko Intercooler 360 indeed works as advertised, it probably makes sense only for those who consider themselves marathon gamers.
If you want to bulk up the sound of your PSP without running cables to your stereo or a set of powered speakers, Griffin's iTrip for PSP is a nice--though slightly pricey--solution.
The Nyko SpeakerCom is the perfect accessory for any gamer who's ever wanted to ditch the Xbox Live headset.