How to add a 2nd account to receive imessages My wife and I just bought an iPad and I set it up using my iCloud account info.  Is it possible to have her receive text messages also.
It is possible.

Go to Settings > Messages > Sending and Receiving > Add e-mail address

This works for FaceTime as well:

Go to Settings > FaceTime > Add e-mail address

However, as Mike and Tetsujin stated above, it is not possible to use multiple iCloud/Apple ID accounts on the iPad ;).