I just had a look and our club 10 record is about a minute slower than I thought it was, so it's just entered the realm of the possible for me. Not in December mind you, but perhaps I could hit a fast course early in the year after smashing some intervals to see what happens.
Yes, a few people are lining up to go sub-20:00 for 'fun'. There's a thread on TTF for pre-race bantz