The Yahoo reason, and lately MSN - are the reasons I didn't go with RTComm beta this time. You can update the purple library and that will allow connectivity to Yahoo.

To me, the space saved between the two is neglible. They both rely on the purplelib - which is the bulk of the size - but to me, as stated before... it's not as integrated as RTComm at all to the OS.

But it's updated more often than RTComm. And that's why I chose it.