In Google Picasaweb you can directly order prints for your pictures. The option comes at the top right corner.

I just checked the what's new page :

Anyone can upload videos using Picasa
Finally, a way to share those digital camera movies with friends. Learn more

  

Search and tag your photos. Search over your friend's public photos
Hey, we're Google. Search across album descriptions, captions, our new tags and more.

  

Order prints and photo products
If one of our print providers sells it, you can order it.

http://picasa.google.com/intl/en_US/web/whatsnew.html

screen shot : http://picasaweb.google.com/hjr.photo/GoogleStuffz/photo#5008255740833776178

See the previous thread http://blogoscoped.com/forum/79461.html