My first advice is to try to find things that can be improved or created outside of the paintball installer. It is highly unlikely that you will be able to accomplish most of the ideas in this thread without having jitspoe do all of the work.
I'll throw a few out there:
- PB2 Etiquette Guide (expected chat and play behavior for pubs/matches/irc/forums)
- Public Stats Tracker (each pub server easily sets one up, or a global site with data from approved pub servers)
- Match/Scrim/Tournament Site (stats for clans, demo downloads, integrated with IRC services and stats from match servers)
- HR4 Texture Repository (user contributed site for texture uploads, listing of needed HR4s, texture pack releases, a starting point for an approved HR4 pack)
- Map packs (different map packs for all/classic/popular/pong/siege/etc., spotlight for new map releases, add-on packs every few months)
- External cheat detection software (how else can we catch speed/sound/map/model/texture cheats??)
- PB2TV (it should be possible to hack in GTV features into a new .exe, serverdemo and playback control support would be nice here)
- Social site for clans (let each clan have their own profile page, member list, recent matches, unmoderated flame wars)
- News feed (interesting news/drama taken from matches, irc, forums in one place.. updated a couple times daily)