Two off the top of my head are:
http://www.taskasap.com (user: req, pw: req)
http://www.cargospy.com (take the demo link)
For performance you could check out:
http://www.west-wind.com/presentations/VfpDotNetInterop/aspcominterop.asp
and look under "ASP.NET and VFP COM object performance". The slowest numbers he got were 40 requests per second or close to 3.5 million hits in 24 hour period. Also keep in mind, he may not have optimized for speed which would use early binding and run in low isolation...

>Just interested in hearing from anyone using AVFP in real-life installations, hit activity, performance bottlenecks, sites I could see, etc... I have a client interested in new web work and wants consideration of doing .Net, AVFP, WWWC..
>
>Would greatly appreciate input... Thanks