This sounds stupid, but I find it hard to find an easy way to follow someone on twitter, if all I have is the persons specific user name. I use Twitterific on my iPhone and iPad, but don't see any option to simply enter a twitter user name and to bring up that profile and follow that person. I'm not even sure how to do it bringing up twitter.com on safari. If you simply have a twitter user name you want to follow, what's the easiest way to do that??