O man, you're strong. I used to run O-races after TRI races, but doubt I could make it now - gettng older. So 'kui jelezo poka goryacho'...
2009 NYC Marathon is a possibility, my knees do not like the punishment of running after 80 min, and I am working on it.
Get Brad Hudson's book "Run Faster from the 5K to the Marathon: How to Be Your Own Best Coach". I got one few weeks ago and found answers to all my questions. It should help even running gurus like you. I'm revising all my training for the upcoming year. Well, as much training as I can afford taking in account family and work (putting 55-60 hrs a week lately)...