Well, at this point bestestblogofalltime.blogspot.com and www.bestestblog.com both get you to the same place. So feel free in your linking to put it as either. In fact they both have the same Page Rank. This says to me that although at this point most of the links out there point to bestestblogofalltime.blogspot.com, there is some sort of symbiotic relationship out there as far as page rank goes.
Do you know how much domain names cost? If you really don't, take a guess at the yearly price. Ok got it? Did you guess about $8? Because that's how much they cost per year! You might have guessed higher. Most people confuse hosting prices with domain names. Hosting prices are what you pay a company to provide a place to put your website files (kinda like what Blogger does for free). Domain names are just a name.
But, New Blogger has an easy way to set up configuring your domain name in. If anyone is interested in buying one, I'd be happy to help you set it up.
Stay tuned a little later today. I'll be having a contest where you can win a domain name and some premium blog credits!