Bukkit

1) Updated for Bukkit 1.2.5-R5.0 version.
2) New command /blf online to check online friends, /blf list still lists all your friends.
3) Decreased invite spamming, if player A sends invite to player B, player A cannot send another invite to player B before sending new invite to someone else or loggin out.

/blf online (uses blf.use permission node).
note: to stop all invites coming player B can use /blf invite to temporary disable/enable invites.

How to update.
Add following lines to bottom of your config.yml;

Error-NoFriendsOnline: 'You dont have any friends online :( '
Prefix-List-Online: '[Friends Online] '