The Minnesota Gathering is a small meeting or micro convention (their term) where friends of Dave Arneson, original Blackmoor players and other gamers meet up. This can be a nice alternative to the larger gaming conventions and those interested in Blackmoor can probably get a chance to talk more at length with some of those who helped shape the birth of D&D. 

The gaterhing is organized by Kevin McColl and the Castle Blackmoor group. 

This year's TMg is scheduled for August 21st. 

Once more details are revealed, I will report it here.

-Havard