The fellows over at cyclocross.info where kind enough to go ride around the track for us, you can watch from their perspective here. Synopsis: it's not the hardest race we've ever seen and the obstacles are all man-made, but hey, at least they've predicted rain. The obstacles:
When I say Irish bank I don't mean the broke monetary kind, but the sandy-bit-by-the-river kind. Sadly, there is no river on the track and there's no sand on this bank. The name is all wrong, actually. The Irish bank is a steep slanted hill, which they go up and then down again. Next it's over one of what seems like 454 bridges, after which they shuffle through a small stream. Not much of an obstacle per se, but enough to trip you up. Holeshot is after a 180° turn.
A BMX-like jumpy wall that would make Styby airjump for joy, another bridge and a patch of grass that's suffered from the rain all lead up to... sand! Not very deep though, so it shouldn't hinder the bigs.
Bridge, grass, stairs, more grass, a bridge after a 180° turn, THE BEAMS, more grass, the small stream and then The Gaverbeek, another stream to jump over. Wider than the earlier one. More grass, and then up and down a slanted hill like the Irish one we had in the beginning. Then the final bridge, and that's pretty much the last obstacle before the finish - cross it first and you can nearly start lifting your arms over your head.
Overall impression: flat grass - which will hopefully become tricky sticky mud by Sunday - a gazillion corners and a handful of bridges. Also, stairs. That's all I can give you without having seen an actual race on it.