Free, open-source software for all; but if you're feeling generous, you can donate!
PS3BluMote (formally PS3 Remote Application)
Allows you to use the official Sony PlayStation 3 Blu-ray Bluetooth remote (and other compatible PS3 remotes) within Windows by emulating a keyboard.
Pairing and setup instructions can be found in the README file.
Time has been spent developing and testing these applications. The applications are free for all but please consider supporting me and the open-source world by donating a small amount of money.