www.vacycling.org
I think that there is only one more GFTL this year [which you guys should go to!]. There was also at least one more track race at the Langley speedway too. All the races have been fun. There's been talk of running a weekly series next year.
I ride on the road a lot, and I noticed that a lot of guys get tired near the end of the longer races. I'm no expert, but I would recommend trying some longer road rides (>20 miles), both slow and fast. That said, everyone is hurting at the end of the race

And stamina is not as important in relatively short track races as in long road races.
The flying 200m is more a matter of discipline. You just have to convince yourself to suffer. I had tunnel vision at the end of the last one I did. "Stay on target".
http://www.bikereg.com/events/register.asp?eventid=6304
But get some experience of group riding first...