I had to laugh today because I went to go get a burrito and on their sneeze shield was a sign that said something like, "Find Us on Twitter". Now see, I've learn so much from vb.org members as I would have never known what they were talking about had it not been in a thread here. LOL
Twitter is cool and can be very entertaining but also very interesting. Worldnews travels faster on twitter then on websites, radio or tv.
Anyways, it is a very powerful tool when you use it with an iPhone. On the go twittering small messages and including snapshots is just plain fun. Try it first and judge later. Don't forget to get some friends starting with you. It's really cool to know what some of your friends are doing at some moments in time.
I like using brightkyte posting where I'm at with images and it goes to my facebook and twitter.
It's fun to see what's going on around you in real time.