DealExtreme has a couple of IR controlled RGB led lamps available (1, 2, 3, 4, 5 ) with GU10 or E27 connector. Kees, the unstoppable tinkerer, loaned me one of these (I’m assuming it is this one) to play with. Aldi Netherlands has them as well.
To control the lamp the IR you first have to record the signals of the remote. For WinLIRC the procedure is described here. In my case I first had to upgrade the firmware of the IR Toy to 09a.
The DX RGB lamp is well built with a metal housing and neat PCB and seems hackable.