Please note that I'm not the Bitcoin author - if you don't trust me then don't use these. I have written instructions that should get you started if you want to build your own (look around at my other posts).
Some unofficial builds that I created:
Mac OS X, Linux (64 bit) and Win32 builds available
Joozero I'm sorry if it doesn't work for you.. I noticed that the performance with the windows client seems slower than the other two I built.. I'm not sure if this is because of a mistake I made or something I overlooked in the code but I will take another look and let you know if I find anything. Maybe there is something else wrong with it besides just the performance..
I'm working on getting version 0.3 released as soon as I can. Just a last few things left to do. It's been a long time since 0.2 and we need to get a prebuilt bitcoind with command line and JSON-RPC available. This time we'll have both 32-bit and 64-bit linux binaries, and Laszlo is going to build a Mac OSX release. Plus, we'll include the German, Dutch and Italian translations by DataWraith, Xunie and Joozero (thanks you guys!).