Is there ANY thing I can do to jailbreak at this point? If I remember correct, I can not downgrade to 4.0.1 but what about a 4.1 beta?

The only thing you can do is get your SHSH for 4.0.2 backed up with TinyUmbrella asap. This might help with a future jailbreak.

Don't touch 4.1 most of the betas include a baseband update that can't be unlocked with ultrasn0w.

Plus on the iPhone 4, both baseband and iOS require SHSH to restore. You cannot cache/save SHSH for the baseband restore.

I'm pretty sure that Apple has already stopped signing SHSH requests for 4.1b1 and b2