Is there a way to tell if I am still using beta after upgrading? I've been constantly upgrading my beta and I am, as far as I know, completely up to date. But, I can't really tell if I am up to date in terms of beta or 12.04 as a whole.
Is there a command I can run to check?
Try with update-manager -d and find out if you see an Upgrade button. Or run System Monitor and check out the System tab and read the text under Ubuntu. If there shows Release 12.04 (precise) 32-bit you are out of beta.
Enjoy the new LTS release and have fun with Ubuntu ;)