Well now I regret switching from the Droid X to the Incredible...
Mine hasn't blown (yet), but I try not to turn the volume ALL THE WAY up, just most of the way. So far so good.
mine has lasted 8 months without actually blowing. but the day i got it 8 months ago i posted that i thought it was the most disappointing feature on the incredible. it just sounded cheap and still does. they use cheap speaker in my opinion. htc and vzn wont acknowledge it, but if you googly it, it has been a problem. i believe there are even youtube videos that show you how to install a different speaker?