BlackBerry Pearl 8130

I would love to get a Blackberry Pearl, but am having a hard time justifying the extra $30 a month data plan that goes with it. Part of it is that I have absolutely no experience with a Blackberry and don't know everything they are capable of. I know they can access the internet and your email but I also know that you can do that on other devices as well. What puts Blackberry over top of the others? Thanks