Ewan, You're right. Some of us did go to Nurburgring last year - partially because I was getting married a couple of weeks later, and couldn't get to Le-Mans (bad planning, but genius in the long run, trust me!)
Anyway. Nurburgring. Perhaps the best weekend of my life. Beware though - It's absolutely flaming brutal. It was hot when we went, reasonably warm at night, and the germans thought I, and most of the people I was with, were absolutely nuts (perhaps due to the expletives written on my back, as I was stripped naked and left 2 miles from the campsite with nothing but a shoe and a pack of fags to cover my dignity - just as the last car crossed the line and 200,000 people started to head for the same campsite!).
I can't honestly comment on the racing - my only exposure was the last 30 mins of the race, and for 5 of those minutes I was pinned to the floor with Andy Zarse ripping my clothes off me - literally (Team Zarse is a very close group - apparently!).
But it is a fantastic weekend - as with any of these events, the people you go with make it, but the general atmosphere was far more chilled out - and believe it or not, the germans do really know how to party (until 6am it would seem too).
However, perhaps the ultimate part of the trip, especially if you drive something reasonably fun, is the drive down, especially the last hour. Once you get off the autobahn (yes, unrestricted fun), you then have the most INCREDIBLE roads to and from the circuit. Not only are they fantastically twisty, technical, and smooth, they also open up, so you can see about 2 miles ahead (handy if you fancy wanging around, at warp speed, knowing nothing is coming in the other direction). I would recommend a Sat Nav with European Maps though - two reasons for this, mainly the fact that its not the easiest place in theworld to get to, but also, if you have said fun car, and said sat nav, and a passenger, he or she can read pace notes to you as you make rapid progress towatrds the circuit.
All in all, If I couldnt, or didn't want to do Le-Mans, Nurburgring would be my next option - it's truly a superb weekend away - sadly I can't do both, so chose Le-Mans - but have a great weekend - and look out for the Team Zarse stickers and branding everywhere - It's definately clear we've been there

Enjoy.
Brad