replays / spectator mode.

ability to kick an afk player from champion select and have a new player join in with champ select timer reset or extended.

ability to create an official team/clan/whatever that the game, client and website recognizes.

As far as this forum, what I would like to see is featuring the better guides out there, especially the video guides. There are a couple of TreeEskimo vids, for instance, where he really goes into minion wave control. After that vid, I shot up 100 elo. Now, I quite easily get a lane-phase kill or two on anyone who doesn't know how to control a wave.

TheOddOne has some good stuff on counterjungling, which he's shown to be a huge part of competitive play. Featuring his stuff and even maybe rewarding him for expanding it would be great.

spectator view and replays also, better commentators

How about revealing Masteries/Runes in loading screen. There is no good reason why you should be blind on what they are using.

I totally agree with the spectator/replay setup, but you have to realize that SC2 has some of the most beastly servers on earth supporting it, the way this game currently runs (Admittedly better this week than last, i hope for the best) I just dont know if one match would support 20+ people. But Im totally in love with the idea. It gets old playing ARAM games one at a time while me or my roomie shoulder watches

If you could bring up a page like the WoW armory page i would stare at it 2 hours a day between games xD