MAMEHub v2 has launched, with a bunch of new features:
Reduced latency: MAMEHub now uses UDP with redundant information in the packet to remove lag spikes and lower latency
Protocol Buffer support: Now people on different operating systems and 32/64 bit differences can play together without any sync issues.
OS/X Support: The GUI has been completely rewritten from scratch in java swing and now supports OS/X.
WebM recording fixes: Now webm videos can be recorded at full speed by using the remaining cores on your machine.
For people who don't know, MAMEHub is a way to play any MAME or MESS game online with other people around the world. Over 40000 arcade & console games are supported. If you want to see more or get MAMEHub, visit the redesigned website here: http://www.mamehub.info.
I just did a search on MAMEHub videos uploaded in the past 24 hours and here's what came up: