I haven't got the video from Evo to Mac working yet(im sure i am missing something simple), but the Evo to Evo works great, better than Tango/Qik/Fring. It has video and audio at the same time(cough..Qik...cough) and works well over 3G(lowest confirmed functional 3G is -99db, of course 4G&WiFi work great) , wife and I have been playing calling each other from the next room
So if you wanted it and good 'ol Steve J. pissed you off here it is
Several people have asked about battery life and move to sd support,I can report moving to SD has had zero effect on performance, I personally have not seen an effect on battery,NO 100% AWAKE TIME(cough...Tango...cough) it has not showed up yet on "whats using the battery" in our settings->about phone->battery menu, I have made about 23 video calls now over the 2 days. Remember guys, this is a community and these are just my experiences, lets all share our experiences and help out.
Use a file explorer app, dropbox, or bluetooth folder to install to your handset and I would recommend updating your PC client to the latest version.
Oh, make sure you install both, just the add on for video and voice with the current version of messenger on the market WILL NOT WORK, and before anyone screams warez!! this IS free.
THE PEOPLE YOU ARE CALLING MUST ALSO HAVE A VIDEO OPTION ON THEIR END, you can not call your yahoo account on your phone to your account on the computer(if you are signed in on one you are signed off the other), reported issues with ATT yahoo accounts....
Galaxy S i9000M
MyTouch 3G Slide
REPORTED ISSUES WITH SOME GALAXY S MODELS NOT DETECTING FFC
Confirmed video calls to:
PC virtual machines on Mac
No video calls to Mac OS X Yahoo Messenger yet, sorry!