Out of curiosity I did a side by side comparison of the 2007 and 2008 course maps. Some observations:

the course itself is unchanged

new aid station between mile 9 and 10 (2007: none)

new aid station between mile 12 and 13 (2007: none)

the aid station in mile 15 has been moved earlier

new "hydration zone" between mile 16 and 17 (2007: none)

food at mile 19 aid station (2007: ?)

new "hydration zone" between mile 20 and 21 (2007: none)

food at mile 20 aid station (2007: ?)

food at mile 22 aid station (2007: ?)

food at mile 23 aid station (2007: ?) The "hydration zones" have water, misters, medical and toilets -- basically aid stations, but with misters and without Gatorade. In sum, 2007: 15 aid stations 1 Powergel station 2008: 17 aid stations (4 with food) 2 hydration stations 1 Powergel station There are now only 2 miles without on-course fluids: 14 & 18. In both cases, there are aid stations shortly before and shortly after the respective mile markers, so the farthest you'll go without on-course fluids in 2008 looks to be about 1.25 miles.

I heard on the grapevine that you could pay a premium and get assigned a hydration pacer, i.e. a runner pushing a cart filled with Gatorade, orange slices, gels and water bottles who also gets you to the finish line on time.

Hehe. Well, I doubt that they'll go quite that far. However, it is pretty obvious that they upped the 2008 on-course support in response to last year's issues. All of which means you can expect 6 inches of snow on race day. Oops, I didn't mean "snow" ... I meant "airborne cooling & hydration."