Boston Marathon qualifying times

I ran the Chase Corporate Challenge (3.5 miles) yesterday in about 30 minutes. It works out to be a 8 minute 35 second pace. And this is after running the Buffalo Marathon 4 days earlier averaging a 9:59 per mile pace. Not blazing fast, but I have only been running for 10 months. I keep getting faster.
I was just running some numbers. For me to qualify for the 2008 Boston Marathon, I would need to run a marathon in 3 hours 20 minutes. But to qualify for the 2009 Boston Marathon, I would only have to run a 3 hour 30 minute marathon! The 3:20 marathon works out to a 7:38 pace. The 3:30 marathon works out to a 8:00 pace. I don’t think I will be running a 3:20 marathon before April 2008. But I think the 2009 Boston Marathon might be achievable.
My next marathon is in September. I am targeting a 4:00 marathon. And all my past races, I have run them faster than what I was targetting. So I maybe be able to run a sub 4 hour marathon.