Where do you want to scrobble from?
BBC Radio Scrobble
This is a script developed by a fellow Universal Scrobbler user, drailskid. It is an iTunes Applescript plugin which automatically scrobbles any selected tracks in iTunes to your account when it is run. It will work as long as there is a keychain entry in the default keychain with the name "last.fm" with your username and password. If you're not familiar with AppleScripts in iTunes, you can read about them here.
Props to drailskid for this script and for sharing his hard work! Similarly, if you have any US-related scripts/online tools you'd be happy to share, please pass them on to me.
Last.fm Library Scrobbling
Coming soon (hopefully!)