Beejive IM works great for me. It supports multitasking (fast app switching & save state) and push notifications. I don't get any disconnect-errors. They were also fast to support the Retina display.
However, I don't like the fact that the app has been quite expensive (its cheaper now) and they won't even make a universal app. You have to pay again to get an iPad version. For inexpensive apps I think that's understandable, but well...
However, I don't like the fact that the app has been quite expensive (its cheaper now) and they won't even make a universal app. You have to pay again to get an iPad version. For inexpensive apps I think that's understandable, but well...