For those of us who have been using the 0.1 version of this and have received tips prior to upgrading, is there an easy way to initialize the number/amount/average values to current numbers? Will they initialize correctly the next time I get a tip or will this only count tips it sees from here out?
No, it only counts tips received since installing the v0.2.0. I will probably add periodically syncing whole history in some future version - just in case something goes wrong with blockchain.info notifications - and then it would catch up with the previous tips.
awesome...can this be used on wordpress.org or only on wordpress.com
It works with wordpress.org. Not sure about wordpress.com as I don't know what is their policy to install 3rd party plugins. But it should work in every Wordpress installation where you are able to install plugins.
Have you already had 500+ people test out the plugin yet?
No. I think it's much less than that.
How are you collecting feedback?
This thread or comments on the plugin page are fine.