Anyhoo, the day could not have been better for a race ... a nice and pleasant 62-63F at the start time of 6am and finishing at around 67-68F, at the end ...
For this event, my A Goal was a sub 1:36:xx time goal, which would mean a PB, something that I last ran for a 1/2 Marathon Distance in 2004 at the Fall Colours Marathon (1:36:28), while my B Goal was that perverbial sub 1:40:xx and my C Goal was to run at under my goal marathon pace of 1:45:xx ... I was able to it my B Goal, with a 1:36:40, which is a 9:48 course PB and improvement from last year (2009) where I finished up with a 1:46:12 ...
I quickly found my rythm with an opening 4:45 1st KM split ... while my final KM split was around a 4:10:xx
as I realized that a PB was within a distant grasp with 2KM to go, but alas, just missed it by <that much> ... pehaps, that port-a-potty stop at just past the 3K mark may have cost me ... 
As it turns out, my little port-a-potty break at the 3K mark may have costed me a PB 
or, the extra .17K that my Garmin said that I may have run extra due to the tangents/turns in the course .. Anyhoo, not much to say, except that it definitely felt a bit different racing it this year, than it did last year, by just running it to finish ... Looking at the numbers, and comparing last year and this year ... I am totally happy with my performance and result, and hope that this bodes well for me, in the next 5 weeks of training to Chicago 10-10-10 ...
2010
Distance HALF MARATHON (2009 Results)
Clock Time 1:36:59 ---- (1:46:31)
Chip Time 1:36:40 ---- (1:46:12)
Overall Place 205 / 12358 ---- (580 / 11651)
Gender Place 169 / 4504 ---- (462 / 4384)
Division Place 19 / 519 ---- (47 / 494)
Age Grade 67.5% ---- (61%)
5K 22:48 ---- (24:30)
10K 45:45 ---- (49:02)
15K 1:08:54 ---- (1:14:19)
Good luck in Chicago!