Official Google Blog: It’s all about the photos
Picasa Web Album launched on 6/13/2006, is a great utility tool given by Google to its large number of users. And the best part of its availability on download.
Picasa is desktop photo management software and is free, it not help you to organise but also let you edit you photos which almost give life to a dead looking photos.
Whatever photos you are going to upload on orkut or any where else, don't forget to give the touch of Picasa editing software which you can easily download.
Picasa photo software will make pal looking software to glow.
it is also user friendly like other Google products. when Picasa was launched it was available to you only on invitation, but now its free to all.
Picasa come with 250 MB with 100 photo storage and 1600 pixel though it has now been upgraded