I've now got about 300 additional miles on my Kilo WT, since changing the bars, stem, brake levers, and it has been very comfortable and uneventful. The Brooks saddle has remained hard as ever, but comfortable, so I'm happy with it. The chain required one slight retensioning and the right crank arm has needed one more retightening to achieve its torque setting. I rotated my bars up a couple of degrees, but have not lowered them any further. I find myself riding about 90% of the time on the brake hoods and most of remaining time on the drops, maybe 1% on the tops. Basically, my riding position is very similar to what it would be on bullhorns. Most of my rides are about 2 hours non-stop, except for occasional pauses at traffic lights or stop signs. The rear Pasela tire is just beginning to show the slightest hint of wear, and the front still looks completely new.

I've added two accessories:
1) Surly tugnut ($24.99 from Ben's Cycle), which also serves to cover the nasty gouges I put in the dropout paint when I initially installed a full link in the chain before moving the axle back to the middle of the track end with a half link.
2) Sigma wireless computer ($27.97 from Ben's Cycle), which has a nice big visible display with adjustable contrast and a nice big button at the front to toggle modes. It also came with very good instructions in booklet form.

I've added up all my expenditures to date for upgrades/changes/accessories, and have now spent more on these items than the initial cost of the bike. And, I didn't even change the wheels and cranks, which are the most expensive items except for the frameset, itself. Also, only one item, the saddle, cost more than $100 ($114.95), but it all adds up quickly. Still, I feel the expense has been justified to get a first rate bike for under $1000.

Finally, I invite other Kilo WT owners to contribute to this thread with your own recent experiences.