Just tried Coela today. It is like Greg's Browser on steroids. In looking for info on how to use it, I stumbled upon this Japanese page:

http://geocities.yahoo.co.jp/gl/go9life/view/20110117/1295275239

which gives a hexedit hack to remove the expiration message and about box when you start it.

I just wish the documentation was in English so I could figure out how to fully use it.