Hi,
Are there any turn key solutions out there like Visualware's MCS which you can install in a datacenter and let customers check overall throughput/latency and other metrics from their locations to the datacenter?
I think someone also mentioned M-LAB but I didn't see the URL. They're at: http://www.measurementlab.net/tests
This one isn't self-hosted, but I like it a lot: DSL Reports Speed Test http://dslreports.com/speedtest
Rich