jchocchip, Yeah, on better 5K time and for starting at the start time :)
FryOneFatManic, Good on you, running is hard when you are heavier. I know as I was well over 17 stone when I started running. I am still fat at 13.5 stone but a lot lighter than I was and I reckon a lot of that is down to running three times a week (when not pregnant) I graduated from C25K in November 2011 and have learnt to love running, though I still spent a lot of my running time thinking WHY am I doing this but it is worth it. I think I might be getting addicted to running.
It might be worth you looking at 'Fore foot running' on google and youtube. It was recommended to me as a heavier lady starting to run as it reduces the pressure on your knees and hips. It worked for me, I have been running for a year and (touch wood) I haven't yet had shin splints or hip pain. I only had a bit of recent knee pain but that was because I had knackered my trainers and improved my gait by losing weight (yeah me) so a new pair of shiny trainers and the pain went.
Update on me, Yesterday I finally got to our local 5k Park Run. I was hoping to get a time around 46/48 minutes, when I finished my sports app said it was around 42 minutes and my official time is...drum roll...39 minutes and 6 seconds ! 
I am so pleased with myself, I nearly gave up running within sight of the finish line but my DH (who had already finished the run and had come back onto the course to escort me to the end) really encouraged me to keep running !
It was especiually surprising as when everyone ran off at the start really fast leaving me trotting along at my slow pace. I was at the back on my own for the first 15 minutes or so but half way through the course some people start walking whilst I trotted past them at my consistent yet slow pace. I am a tortoise not a hare ! So rather than last place as I expect I was in front of 10 people ! Not that it really matters, as I am there to run against myself not the other runners.