10000 iPhone Apps and Counting

iPhone MosaicHappy 10000 day to the Apple Application store.  It is official, this week marks a major milestone for the iPhone Application Market that many doubted.  The fine folks at TapTapTap put this mosaic of all the application icons together to mark this momentous occasion.  10,000 is a big number to be proud of, but I wonder just how many of those are truly useful.

Personally, my favorite apps include: Fieldrunners, Flick Fishing, The Official Geocaching Application, Pandora, Google, Wide Email, WootWatch, and PageOnce.  There are a few others that I use, but that is my must have list.

What about you?  What are your stand out applications; which of the 10,000 would you die without?