Maybe this is already possible, but I cant see how.
I'd like to be able to either:
a) select more than one sms recipient (don't care whether it's sent as multiple SMS or one group MMS)
OR
b) select one of my contact groups as a recipient as can be done in mySMS.
At the moment, I'm running mySMS just for this reason.
It doesn't have the other nice features that Join does.