Thehorse.com had a lot of Olympic news in the e-newsletter I got this morning.
They have the results of the Eventing competition, an article on the U.S. Team Cross Country and some Veterinary Updates from Hong Kong.
There is also a link to the award-winning author Jennifer Bryant's blog of behind the scene at the 2008 Equestrian Olympics. This looks like it will be really interesting. She is seeing things the way I would look at them. Jennifer wrote "Olympic Equestrian: A Century of International Horse Sport".
I just checked on the Equestrian portion of the Paralympic Games to be help in Hong Kong September 6 through September 17th. Their website has some interesting information including qualifications and classifications.