With 4.7.1, iTunes introduced a 5-connection limit on sharing. A lot of my friends work in offices where everyone shares their music, and they found this to be a real pain in the ass.

Well, perhaps I'm late to the game on this, but this site claims to have a workaround, and it's as simple as setting a password on the music share. Supposedly password-protected shares aren't subject to the 5-a-day limit. The authors suggests using the share name to tell folks what the password is in order to make connecting simple for everyone.

I haven't had a chance to test this out, but if anyone's in an iTunes-heavy office and wants to give it a try, I'd be very curious to hear if it works.

Related: iLeech and RendezvousProxy, for pulling songs off iTunes shares and making shares accessible across different IP subnets, respectively. Documentation is sparse, but if either of these sound useful you might want to give them a download. They're written in Java, so they ought to work across platforms.