Grooveking.com, makes an old Motorolla DynaTAC 8000X or "Zack Morris phone" into a Bluetooth headset, that'll get 8-times the juice of a normal battery. The second project, from DIYHappy.com, takes an old NES controller (which has already gotten the Bluetooth treatment in the past) and fills it with the guts of a Nokia 3200 – yes, the American Idol phone. You need a little technical know-how to make these for yourself, but after you get the hang of it, all of your gadgets might end up crammed into NES controllers. Sadly, the Nokia 3200 doesn't have Bluetooth so you won't be able to use these two devices together, but we look forward to the future when our Xbox 360 controllers and Treos are turned into seemlessly-integrated retro kitsch.
[Thanks Zack and Sam]