Links

The Unofficial Farnborough Airport Website
Very useful airfield details included here, particularly the viewing info and maps, together with a full residents listing, comprehensive movements reports, and lots of interesting photos (although unfortunately these are all full size without thumbnails, meaning that it can take an awfully long time to download a page). Also contains good SBAC 2000 coverage.

Farnborough Movements and Photographs
Could potentially be a useful site if it was actually accessible, but unfortunately seems to have such a dodgy design (watch for those Javascript errors) that it's almost impossible to get anywhere. A lack of updates means that this aspect probably won't get much better in the future, either. The only bits that worked for me (on numerous visits) are a frequency listing, a map, a useful rundown of aircraft wrecks with the AAIB, and an SBAC 98 participant/visitors list.

AvInfo
Good viewing information for Farnborough contained on the 'UK Airport Guide' page.
The main site is mainly concerned with Birmingham airport, with other sections including a very comprehensive collection of links to worldwide airline and airport homepages, a huge listing of IATA/ICAO airline/airport codes (unfortunately searchable only by code and not by name), a large photo gallery (mostly taken at Birmingham, Manchester or Heathrow, and generally fairly good quality). Very useful resource.

Ntangle's Farnborough Homepage
Not really intended for the general enthusiast, but includes frequencies, a CAA map, photos taken at the DERA open day, and limited info (participants) and photos from SBAC 96, 98 and 2000.

Farnborough and Southern Airfields List
A newsgroup-type mailing list, intended for members to exchange information regarding visitors, rumours, news etc. about Farnborough. I've never joined this one so can't comment any more than this, but these groups can be very useful, especially if you live in the area.