I agree, go for it, but have a back-up plan in case it sells out before you can register.
I ran my first full last summer, by far one of the coolest 'personal best' moments of my life, outside of marriage and my children. I plan to do it again this fall, Lord willing :)!
I would add, though, that for me the training was more daunting than the race. Pick your plan carefully. This time I won't use a plan that has a 10 mile run scheduled for a Tuesday, for instance. I'm a wife, mom, school nurse...my week day runs need to be a little less time consuming.
"I just felt like running." Forrest Gump