Looking around registrars, I see some offer special reduced prices for a limited time. Once the domain is up for renewal, will these prices still hold, or will you have to pay the "regular" price from there on?
It's possible. Just read the fine print to be safe. Also read if they will allow you to transfer the name to a different registrar if they DO stick you with a higher renewal price. There's always a 60 waiting period to transfer a domain name from the day it was registered, so, again, just read the fine print, email them and ask them what their price freeze policy is, etc.