I used Mundu IM for like 2 years on my Treo. It used data there, and not SMS (although I think it might be able to be setup this way, I don't recall)
Originally Posted by LarryPinsky
I like JiveTalk better on my BB for it's alerts and auto-away when holstered, although I seem to lose IMs fairly frequently while using it in a low signal strength area. Just my sent IMs, people just don't get them sometimes. However, it happened while using mobile AIM (but not GTalk app it seems). It wouldn't happen using IM+ though, and it never happened using Mundu on my Treo over Sprint even with the junk signal I got.