I'm curious if this got resolved.  I just tried middlecoin for the first time.  Mined roughly 24 hours at 1500-1800 kHash/sec.  I see my wallet address in the list on the site, but no payout seems to have ever occurred.  Nothing in my coinbase, and the payout column is empty on my address.  Not sure what's up, and no real way to contact.  Not sure if I should keep at it, or if I'm wasting my time there.  I wanted to compare 24 hour results there vs multipool.