My Sammy 50" DLP still has the original bulb. It's over 4 years old now. Still looks great.
Of course I'm sure it's going to blow right after I click the "reply" button, though.
edit: I think DLP bulb life is one of those "theoretical" problems that, "on paper", is a great way to sell people another type of TV.
It's like car geeks sitting around trying to figure out what is the best car in its class and coming down to the 0-60 times, and the top two are like .1 second apart. An irrelevant difference.
Just something for TV geeks to argue over, just like burn-in on plasmas. I've seen countless posters here and there say "but DLP's eat bulbs, and bulbs are expensive, that sucks".
In reality, DLP's do not eat bulbs very often. I know many, many people with DLP's, and nobody has had to replace a bulb yet. Some folks certainly have, but it's not a "real" concern to me.
And probably NOBODY'S home DLP has as many hours on it as mine.....most days it stays on all day long, looping kids movies. Then whatever I watch at night. Or games.