After modest pressure from Chickie and Pete I've decided that I am, in all probability, capable of running a half marathon.
I did a couple of 12k runs recently, one near my new apartment along the banks of the Qiantang River which was nice as it's completely flat, and another run to the office (also 12k but certainly not flat) and I'm convinced 21k isn't that much further to be a huge problem (obviously a full marathon is a different prospect!).
I am going to be (hopefully) signed up for the Singapore Half Marathon shortly and am currently waiting to find out the date of the Hangzhou Half Marathon (as I can't run if it clashes with an MBA weekend). Unfortunately no sooner do I make the decision to train for a half marathon than I fall sick with two colds one immediately after the other.
It's worth a quick plug for my (on my last three runs anyway) new running companion, Podrunner. Whilst Dance music isn't naturally my thing (my previously oft-used running music was Linkin Park), running to a constant beat stops me from keep changing my pace when the music changes pace. Just need them to be a bit longer (like 2.5 hours) to get a half marathon done without having to fiddle with the iPod.
At this rate I'll be joining the newly formed Hangzhou Hash House Harriers before you know it.