I'd really love the ability to export (at a minimum) my roster to CSV (or maybe xml) and ideally any team or all team rosters.

This would let me eval spots in my roster more easily.

Starting a new league, you often have a close group of players that you're familiar with.  It would be great if you could send out invites via email and when said user(s) registered at or logged into the site, they would be added to the league.