Thanks for all of the info. I had a successful transaction with Coinbase, already! What I need to know now, is how do I get my Bitcoins from MtGox to Coinbase. I can't find a button with that option. I have a Bitcoin address at Coinbase, and was looking to do it that way. Thanks!
I haven't used Coinbase, but if you know your address at Coinbase for depositing bitcoins, then all you need do is go to Mt.Gox, select withdraw bitcoins and then paste the Coinbase address into the field. Some time later the coins will appear in your Coinbase account.
If they don't, I might have to delete my account from this forum!
Seriously, if you're unsure, test it with a small amount first until you get the hang of it.