Went into Best Buy a week ago to get some minor hardware damage fixed on my Pre, and discovered that I have to send my Pre away for a week! Couldn't do it at the time, but finally have to courage to do it now. So....

I'm gonna have to use my Centro for the time being, it has most of my contacts but not all.

What is the best way to switch my numbers over without breaking the bank? (or going to the bank at all!)