I'm with Single on this one. If you think instagram is lame, you need to revisit it and follow better people.
Here is why I'm into instagram:
1. It gets me looking at hundreds of pictures every day: some good, some bad. Either way it keeps the creative juices flowing. If I'm standing in line at the DMV, instead of reading People Magazine, I can be looking at pictures from around the world.
2. It's changed the way I approach photography: there is no place you can't bring an iPhone, so I shoot a lot more because of it. This summer I've shot a ton of mountain biking that I otherwise wouldn't have lugged my dSLR out for.
3. Shooting on a smart phone forces me to be creative, and forces me to keep it simple. No high speed shutters, no pocket wizards, no telephoto lenses. Just a camera.
4. Sharing is caring. I have so many great images sitting on hard drives that have not, and probably will not ever see the light of day. Instagram changes that.
5. It makes photography fun again. 'Nuff said.
Here are a couple favorites from my instagram feed the last couple weeks:
http://distilleryimage4.s3.amazonaws...0a1e8a6d_7.jpg
http://distilleryimage9.s3.amazonaws...0a1cbf2b_7.jpg
http://distilleryimage6.s3.amazonaws...0a1d039d_7.jpg
http://distilleryimage8.s3.amazonaws...0a1d0cf6_7.jpg