Picasa embed options only allow you to use 4 different image sizes. But thanks to a Greasemonkey script, you can choose between 23 different image sizes, ranging from 32px to 1600px. Apart from it, this script adds 3 more image addresses: Direct link, Link with Image tags, and Code for embedding image in forums. If you use Picasa frequently, you should definitely give this script a try.
Get Picasaweb Image URL [via puntogeek]
