For what it is worth, I just received a SUB-20 and didn't have any problems using the .NET functionality in Matlab. In the more recent versions of Matlab (I'm running R2009b) it is a standard package that is included (no Netbuilder needed). If you would like a quick test script with the LCD, I posted some code here: viewtopic.php?f=2&t=165.
Hope it helps,
- Mark
MATLAB & NET. Package
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