Thank you for being more specific. I agree with you that these could be more consistent, mostly by removing colors or by making the coloring more consistent. I suspect they got this way by harvesting them from completed VIs. Personally I think they are a good start, and with a few rounds of iteration based on good feedback, I think this will wind up being a nice resource compared to anything I've seen out there.
Now if I could just find the time or an interested party to build an icon editor that supports editing with measurement and instrumentation clip art. Greg McKaskle