Wow! I must say, after all my whining about Apple's iPhone app review process, I was pleasantly surprised today. I submitted an app update for Tunemark Radio after discovering a crash bug that could occur under poor network conditions. I had read in developer forums that it was possible to email Apple when you had a critical update and there was a chance for getting the update reviewed a bit quicker.
Well, I submitted a crash fix update on Tuesday night and emailed Apple informing them of the update on Wednesday morning. This evening (one day later!) I received notification that my update has been approved. Total time in the queue was less than 2 days. Thank you Apple!
It seems this review process is improving.