How much is 2GB for my IPhone?

[liv-e]

I got an IPhone for Christmas and I have a plan for 2GB a month worth of data. I go on tumblr, facebook and twitter a lot. I will probably use Pandora a lot too. I'll probably use some apps that need the internet here and there. But does anyone know if I'll be fine with the data? I mean I don't go on facebook, tumblr, and twitter every half hour.
I meant of data on a plan.

[evilattorney]

You cannot use Pandora on 3g if you only have 2gb. Nothing uses more data, more quickly than streaming and Pandora is nothing but streaming. The rest of the crap, you can pretty much do endlessly and be safe with 2gb.