Ipoker been a nightmare lately. I've spoken to someone and its being resolved so no need to panic!!
Just a thought, but would it be fair to assume that most people play via a wifi connection? I had a horrid time with disconnections a while ago whilst playing in my conservatory. I subsequently realised that despite being right next to the router it's the worst room in the house for dropping the signal. It seems that even a microsecond of disco can cause iPoker to think you've logged off.
Worth testing by using a cable maybe?