Had a bulb blow out two weeks ago, again at around 850 hours.
The PJ is ceiling mounted, with plenty of ventilation, I clean the filter once per month, run it in Eco mode and do my damnedest not to short cycle it. This would be my 6th bulb, 3rd projector, out of warranty since July.
I was very hesitant to buy a new bulb, because I don't want to drop $200 on this every 6 months. Was contemplating replacing it with a 60-65" LCD.
I read kasheyev's post above and figured of give Epson a shot. Called Saturday, explained my situation. They didn't hassle me and shipped me a new bulb, which arrived just a little while ago. He also have me the whole thing about a bad manufacturing line, etc, etc, but this is the third one I've gotten where they've done that.
I'm pretty happy with Epson's customer service, they went above an beyond what I think a lot of companies would have. On the other hand, the experience has left kind of a bad taste in my mouth. If this one dies before 1000h, then I'll likely scrap the project until I can find a more reliable brand and replace it with an LCD.