Thought I'd post mine..
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http://farm5.static.flickr.com/4113/5202108303_6b34120466.jpg
Switch I got for $5, managed to snap a pic right as it overloaded... (backing up 3 computers for the first time to the FreeNAS server)
Not sure... Cant test right now because its still under full load from the backups. It seems to be going fast though
EDIT: ehh anywhere between .5-1MB/s... not the best, but works
You really need to replace that hub with a proper switch if you'd like to see things speed up and stop crashing.