wireless data service?

[tylik]

We've been going with T-mobile through our cellphones for a while now, and for the most part we've been happy with them. However, we're both looking at moving over to bluetooth phone and doing a fair bit of wireless internet in the near future, which has us wondering if any other carrier offers a better deal -- we currently have a family plan that's worked well for us, but between getting the phones and adding $40 a month for the internet connection, there is a question as to whether it's worth it...

Anyone have recommendations?