Stupidity or dedication?

In the words of Henry Ford "there is no happiness except in the realization that we have accomplished something". This said, I have decided to do something I never thought I would do.
Running has been a very on/off hobby of mine to be completely honest, with my first 3mile run on 24th December 2006, and my latest casual run still only clocking 4.5miles two weeks ago.

As most people probably would have, I watched the London marathon last week, and decided to sign myself up for a competitive run. My sister has recently signed up to do the Cancer Research Race for Life, a 5km (~3miles) run around London's Hyde Park, so I was hoping to do a run a little further than this. I looked for 10km runs, but since I could already do 4.5miles, it wouldn't involve much training, so skipped this and looked for something further...
I then came across Run to the Beat, a musical half marathon (13.1miles ~ 20km) set in Greenwich, in and around the O2 Arena. At the time, this seemed mad but the spur of the moment thought spurred me into finding and emailing FSID, a charity geared towards the study of infant deaths. They happily obliged to me running for them, and my fundraising kit is in the post now.
Skip a week later, and I've raised £55 so far (not the best I know, but since the race is in September, it's not too shabby at all), as well as owning a Facebook group with 120+ members supporting me.
If I bottle out now, I'll look like a loser. Which is fantastic, because it forces me to run.

Over the coming months, I will (time permitting of course) be posting training updates for all to see, and hopefully build a little more awareness albeit by one or two people. Plus, you get to think about the amount of sweat I'll be losing whilst you get to put your feet up. Incentive enough?