...there was another promotion besides that.  I'll dig it up later if need be.

Edit -- Here it is.  From Eovia press release #54:

"Eovia expects to ship Hexagon 2 in April, for both Macintosh OS X and Windows. Hexagon 2 will be competitively priced at US$269. Customers who purchase Hexagon 1 between March 1 and April 30, 2006, will be eligible for a no-charge upgrade to Hexagon 2..."

Only applies to that two month window though.