Apple has released iPhone software update 2.0.2. Again, details on what is exactly fixed is not forthcoming from Apple, so the end user must look to user comments in various sites (Engadget, TUAW & MacNN).
Some users are reporting snappier performance, better 3G signal, fewer crashes, as well as no more annoying contacts or keyboard lags. I have upgraded my iPhone to the 2.0.2 firmware update, so I'll be back with feedback after a little bit more usage. 
(just a heads-up, the update is 242MB to download).
Update ( 08/22/08 ): Perhaps not too surprisingly, some users are still reporting issues with 3G even after the latest firmware update.
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