Where can I find smart people to beta test an iOS puzzle game?

Found! Happy to test and spread it around to other puzzlers I know. Email me if interested.

I'd also love to test/promote the game, email is in my profile.

One thought: Ask on reddit in /r/gaming?

I also suggest looking for volunteers, I think many people would gladly help you.

Judging by comments/submissions there... Meh.

If he just wants purely intelligent people then /r/mensa maybe, or worst case scenario the gamedev subreddit.