I have another update for you today:
- btcmine.com support
What a creative day!

btw. what do you think about include JS miner code in the extension?
Really not worth it, anyone with the knowhow to use this, will not be using a cpu miner...
I have thought about
http://bitp.it/ with big delay parameter - my CPU is 10% loaded by this
and this form of donation will be of course optionally - one could turn it off on the options page