Internet metrics

I am looking for websites that deal with bandwidth and performance metrics as they pertain to the Internet? Anything and everything goes. I need to get a snapshot in time of things like "the average speed of the Internet", the average size of e-mail messages, the average size of a web page, peering points and hosting facilities, current bottlenecks be they hardware, software or networks. Any cool links for this sorta info will be greatly appreciated. Thanks in advance -jamie