That's another point. Challenge sites are not at some "levels".
The "parlament" (suggested in the other thread) should frequently decide which challenge sites "have proven to be worthy to be a part of wechall" (i.e. good challenges, popular, preventing cheating, etc). Say if a new challenge is destroyed by bad challenges or too many cheatings, wechall might also consider to ban this site.
All in all, those challenge-site-"levels" could also influence the max_score of each challenge-site. That would also make the work of our dear admins easier. Hm, Kender, Gizmore?
I agree with you quangntenemy that we need to show the "chall-site-network"-aspect. But a logo should be fixed, actually.