I'm still eagerly waiting for build 21877... NRG said he was going to post it... He even said to avoid 21876 cause it's full of bugs... until then I'll be sticking to 21864...
Also for people afraid of trying 28004 cause it may or may not have Opera 9.5/9.7 here is a link to a thread from xda that has just about every build of Opera from 9.5-10:
http://forum.xda-developers.com/showthread.php?t=486502
(post #1 is Opera 10, post #3 is Opera 9.7, post #4 is Opera 9.5)