If your startup works than it's good no matter what. I still consider Twitter stupid, but what do I know. Tons of people think Farmville is stupid, but Zynga is doing extremely well.

It might not help that you think your own idea is stupid, though.

If it makes money, then it is smart! If you think you have a money maker, then go for it. You can always iterate as you move forward.

its actually very interesting about what @colinsidoti said about twitter, its stupid but yet it kind of solves a problem, although twitter is very celebrity orianted!! thats why i don't like it!!!

I am not a Twittery type of person either, I would rather have people tweet about me and what I am doing than do it myself. Although a lot of people do find it fun and fascinating.

If what you have in mind for your startup solves a problem for people, that seems like something that may be on the right track to make some good money.