richms: If they do put their prices up to that point then you would just move the domain to someone else before renewing it, but I think there are places where the standard price is close to $8 a year so they would be idiots to up the price a huge amount at the end of your introductory deal.
Besides, hopefully in 3 years your business has grown to the point that even if it was $100 a year it would be chump change ;)
Awesome... Thanks for your help