MapDisto 1.7.6 is here, available for Excel 2007, 2010 and 2011.

So this is how new version 1.7.6 compares with previous 1.7.5 in terms of maximum number of loci handled:

* On Windows XP (3 Gb of RAM), Excel 2010 32 bits:
MapDisto 1.7.5: around 3,225 loci
MapDisto 1.7.6: around 8,870 loci

* On Windows 7 64 bits (16 Gb of RAM), Excel 2010 64 bits:
MapDisto 1.7.5: around 6,000 loci
MapDisto 1.7.6: 32,760 loci (limitation of Integer data type)

* On OS X 10.7.5 (8 Gb of RAM), Excel 2011 32 bits:
MapDisto 1.7.5: around 6,000 loci
MapDisto 1.7.6: around 16,000 loci