How old is your MBP? It may not have an HDMI-out port, but does it have a MiniDisplay Port? (Mine does.) With that you could get a cable like this:
http://www.amazon.com/exec/obidos/ASIN/B003OC6LWM/ref=nosim/appleink/
Works fine and sends audio over the same port too.
Also, coming with Mountain Lion (OS X 10.8) this Summer will be wireless Airplay Fullscreen Mirroring, assuming your Mac meets the minimum compatibility requirements.
No, neither of these are the same as ClickToFlash sending the URL to the AppleTV to stream independently to the TV screen... but until Apple fixes that interaction on their end, at least, those are two things to consider. It's difficult to get this bug taken seriously, I think, because it was never an advertised feature of the AppleTV in the first place. And it relies heavily on ClickToFlash reliably indentifying the compatible HTML5/H.264 video to send. So many variables and so many moving targets...