This post is about a simple idea: take a cheap 3 colours Ikea night lamp, hack it by replacing its original MCU and adding a cheap serial bluetooth device and then write a simple Android app to control the lamp remotely from your phone !
This is just the beginning, imagine the possibilities once the phone has direct control over the colours and their respective intensities. You can make it light up in sync with some music, you can make it change colours depending on some e-mails you receive or your Facebook status, etc. ...
You can find more details as well as the code, on the original blog post (I know I'm not allowed yet to post external links, but it's definitely not spam and I can't really just copy and past all the stuff and code examples from that blog here...):
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