There is a TRI section here. It doesn't get alot of traffic, but its probably the best place to post.
I am not sure why a time trial would be any worse than the bike leg of a TRI. I suppose many folks "save" some legs for the run.
I am kind of in the same boat. I trained hard and am now fast enough to hang with the cool kids, but have been nervous to pull the trigger on all out racing. There is an annual triathlon not far from my home, so thats my racing event for the summer. I care most about the bike portion and know my cycling associates look at those results - so I blast my legs trying to get the best bike time I can.