[ImCoKeMaN]

Once you build your first rom via the kitchen you'll understand better why people flash so much. Anyone that can consider themselves a rom builder will have flashed multiple times in a day when tweaking things. Only word of warning i have is i'd recommend waiting ~10 mins between each flash. As colonel referenced i've let the magic smoke out of my phone once, but it was covered under manufacturer warranty. When this happened i was testing my fully customized rom. When it loaded up contacts were there, screen calibration was automatically done, the welcome dialog was bypassed etc. and when one reg change needed to be done i edited the kitchend re-cooked and re-flashed it right away. This made for many flashes in a very short period of time during the development.

My current flashing frequency dropped now that I have a mogul, but that may also change at some point =)

PS. if the rom could be flashed 100,000 times flashing even 4 times a day the phone would last over 65 years. Everything can break eventually SD cards too, but who worries about adding and deleting files on them?