Aperture to Picasa Web Albums is a simple Aperture export plug-in which allows Aperture users to easily upload their images to Google’s Picasa Web Albums.
Aperture to Picasa Web Albums provides support for creating new albums, automatically uploads Aperture keywords as Picasa tags and features both an album selector with cover images and Keychain support.
The huge advantage of uploading photos manually to Picasa is that Aperture to Picasa Web Albums means you don't have to go through the time consuming task of importing images first. The disadvantage is that it's limited to 1000 images per album although it should be more than enough for most people's needs.
Aperture to Picasa Web Albums is an easy way to transfer photos from Aperture to Picasa Web.