I came across a cool online photo editor yesterday - Flaunt R- and it has some very cool transformation effects. I show my original steampunk photo below (taken in Caledon), and some transformation effects, including a cool editor that makes your picture look like one of many old paintings, above. There is supposed to be a Google Picasa plug-in but I have not worked with it yet.
The downside is that this is a very tricky interface, it is not that intuitive, and you have to constantly reload image (it was my fist day with it, but I am good with these programs, and it took forever to do anything). It is also a bit slow. The upside is that the transformation effects are cool. I am still learning this one, but it seems to be offer allot for a free site.