To use Picnik, all you need is an internet connection , the site is very flashy and you need to wait a lil bit more provided you have almost 2 mbps site , cos once the site is fully loaded , the editing and all that customization stuff is rather smooth !
Although it isn’t necessary to register with Picnik, you can still see the option and i suggest you to Registe as it will allow storage of photos . You can upload photos from your computer or from social networking sites, such as Flickr, Facebook or Photobucket. Clicking on a website's icon will automatically connect your Picnik account with the selected website. The edit section allows you to adjust the color of the photo, resize the photo, rotate the photo, crop the photo, and remove red eye.
"We're not announcing any significant changes to Picnik today, though we'll be working hard on integration and new features," Brian Axe, product management director at Google, wrote in a blog post.
Its a boon for the those people who are or wanna be Pro in Photography as it will add the killer edge for the a perfect Snapshot !
Link : http://www.picnik.com/