I just can't wait for Emacs24 to be released! (I know, it's in beta and it'll be officially released Real Soon Now, but my catalyst is Technomancy's ESK2 which is such an improvement over ESK1, and it needs Emacs 24).
In my last post I had steps to build emacs from source-code. This is worth following for hacker cred, but it soon gets tedious if you have a lot of systems to put emacs on. As pointed out by a few readers, there are some snapshot builds available for different platforms. This post lists steps for installing the pre-built snapshots, for the three operating systems that I use.