Technically, I guess this could be called a "Failure Story", but I'm going to foccus on the positive.
Friday night was the first time I've had a <30 mpg commute since the end of May. Now, keep in mind, the mpg number is based on my in-cab display, which is rather optimistic (~15% high typically), so 30 mpg is actually something like 25.5 mpg, but I guess it's a psychological thing to see a number in the 30's.
I started my FE quest about March and the end of April was the first time I had a commute over 30 mpg. I started my daily log on May 10, typically averaging about 28 or 29 mpg. With some better routes, some hypermilling, and a few mods, I'd gotten my average up to the mid to high 30's by late fall.
The cooler weather has taken it's toll and recently my average has dropped to the low 30's. My evening commutes are particularly bad, because I can't plug in like I can in the mornings.
So anyway, I got 29.9 mpg on Friday night. The freezing temperatures, some gusting headwinds, and catching a couple lights badly all led to my streak being broken.
All in all though, considering what I drive I gotta be pretty pleased :-)