I've searched extensively and found little or no help on enabling Gmail Labs on a Google Apps account. I have checked the new services box under 'General' in 'Domain Settings' for my domain, and waited about two weeks - still no 'Labs' tab in my Gmail settings.
It's frustrating that regular GMail users have these features rolled out almost seamlessly, but that there's very little help for those Apps users who are still wondering why we don't get access to the experimental features too. Consistent user experience shouldn't be something I have to ask for.
gmail rejected by other accounts, and gmail tells ME to contact THEM to tell them how to fix it! I called cox.net, and of course they do not FIX gmail's problems. What to do??!!