There has been a growing number of cross mobile platform IM apps coming out in the last year or so. Tashanna let us know about another one called pMessenger that I had never heard of before. From what I can tell it was released in beta form a long time ago but it actually has a good number of people using it. They offer pMessenger apps for BlackBerry, Android, and iPhone devices so they have most of the platforms covered. Supposedly a new version of the BlackBerry client is coming soon (pictured above) which should add a nice set of features to the mix.
If you were looking for YACMPIMC (Yet Another Cross Mobile Platform IM Client) check out pMessenger at www.pmessenger.net or you can simply download the client at www.pmessenger.net/bb. Let us know how you think it compares if you give it a spin!