My host just upgraded to PHP 4.1.1, so some things might look broken. I'm pleased to see b2 still works in this version. I might still upgrade the code to make it use the 4.1.x improvements, when enough hosting companies have switched to it.

One broken thing, is the little script I used to display the /releases folder. So in the meanwhile, here are the links to download b2:
b2 v0.5.1 (20011206) (zip file, that's for Windows users - for others, here are the links to tarballs: tar.gz, tar.bz2)

Converters are here: GreyMatter, Blogger. Just download, rename to .php, upload in b2 directory, run from browser and follow the instructions.