Picasa is a desktop application provided by Google. But still you can sync Picasa with your iPad using Google+ and Picasa Web Albums. Go to https://picasaweb.google.com/ & sign in to your account. If you don't have an account, then create one. You can also log in with an existing Gmail or Google account. Now, upload photos to Picasa Web Albums from your iPad. Click "Upload Photos" button located at the top of the page. You will see 2 options, "Create a new album" or "Add to an existing album". You can create new album to organize your photos. Download and install "Google+" app on your iPad from the Apple App store. Sign in to your Google+ account using your Google account. Tap "Menu" icon and then tap "Photos" option (with the Picasa logo). You will see all of your uploaded photos. Go to the Google+ home screen and tap "Photo" icon. You will see the photos from your camera roll. Now you can upload any photo from the iPad's camera roll to Picasa Web Albums. You can tap "Camera" icon to take a photo using iPad's camera and upload to your Picasa photos collection.