StumbleUpon recently launched Su.pr, their new URL shortening service that allows you to cross-post to StumbleUpon, Twitter and Facebook at the same time. It provides various traffic statistics and also allows you to schedule posts in the future.
It’s currently invite only, but I have a few invite codes to give out. Just use suprsquid when signing up.
Check out Tim Ferriss’ write-up on Su.pr for more info.
UPDATE 1: You guys are fast! All 250 of the invite codes have been claimed.
UPDATE 2: SU just gave us another 250 invite codes to give out.