Ringtones:

First make sure you have the unlimited data package. Then a few sites you can go to are:

www.mobile.zedge.net
www.mobile41.com

When you find a file you want to download, click on it, open and play it first, then save it to your micro sd card.

I'd push you to listen to them first, I've listened to hundreds and hated them. So just save you some time.

Email:

There is a setup wizard for putting emails on your phone. if you just have personel package, you won't be able to do enterprise (corporate emails). You can set up your own phone email (i.e. derek0225@uscellular.blackberry.com) or pop3's like gmail, yahoo, hotmail, aol. I avoid yahoo and hotmail because you can get the SPAMMED like crazy.

Picture Messaging:

I dropped pic messaging. If you are paying 24 or 39 bucks for the unlimited data, why pay more for sending pics. Just import them into an email and shoot them off.

Hope this helps! And good luck, you should enjoy the Pearl. Great phone! It will run out of memory, so watch the themes, etc.