I have tagged the latest code in SVN as B3 Final. I would encourage everyone that knows how to use SVN to download the contents and give it a go.
The updater and installer have been updated with the database changes and this should be a very stable build with many bugfixes.
Once I test it further(and hopefully some people also test it) I will package it up and release it as a proper download on google code and our main site.
Watch this topic for when its released proper, including a full change log.
EDIT:
I have updated all download sources with the new Beta 3 code.
ChangeLog
added installer and upgrader SQL for new bans feature
Fixed URL Uploading
Added Robust Ban Backend
Fixed more bugs
Added Ability to edit username in admin
removed stuff, some random house cleaning
fixed cron bugs
added file expire functionality
added first hook, allows rewriting of all file links.
resolved private user group display error
resolved long standing issue of not being able to download 2 or more files at once.
added advanced embed support and new embed API
added new group options
changed logic for admin panel link
optimized some code
fixed security hole in file storage