I've been trying the Group Text Messaging app from Palm and it has NOT been reliable for me.... not at all!
I tried it this morning - sent out 20 texts among my friends as a "test" ... and asking them to just respond back with an "OK". I got ONE back. So I called 5 of them back, and none of them had received the message. Obviously, this is discouraging.
Much like the OP, I also need an app that will let me group 30 names or so together, save them as a list, and then be able to send one message out to all of them. And then be able to (obviously) re-use that list.
3jam is NOT an option (as I understand it) because it doesn't have a way of sending to a group without the entire group being responded to.
I need to use something like this in my business... (not spamming)... more of an RSVP sort of thing - and I can't have each response going to the entire group for obvious reasons.
I am using a Treo 650 that has been flashed over to work on Cricket... it's fabulous... and texting normally works just fine on it. But the Palm app is absolutely worthless.
I think there would be a market for something like this.
