In general, I don't think it is a good idea to connect to multiple services over the same Tor link. One of those services could be compromised in some way (hacked, government backdoors, etc.), and could be used to de-anonymize sessions at other services, by using the ip-address of the exit-node and the time-frame in which the communication took place.
After discussion on the Tor mailing list a while back, that issue was solved in Cloak (http://reclaim-your-privacy.com and http://github.com/ReclaimYourPrivacy) by using different Tor circuits for each service! The relevant file is here: https://github.com/ReclaimYourPrivacy/cloak-cloak/blob/maste...
Your anonymous presence and your public presence should always be 100% separate.