If longhorn RTM runs as well as RC1 has, things are going to be really awesome! My RC1 (version 5600) Longhorn server has been up for 86 days and counting. I'll put some stats together to see how many requests http://iislogs.com has served. Memory usage has stayed at about 80% to 85% memory usage. Not bad for a desktop pc with 512 MB shared memory. I wanted to pass this along to let people know how stable IIS7 and Longhorn is. Exciting things to come!
'Here is a picture showing the uptime.