That's a great idea, and you're generous to offer to coordinate it. Have a look at this Bed sizes
topic. A few months ago, Mike Watters instigated what you suggest, although it was not by searching and compiling, but by having all interested people actually go out and measure and post. That result didn't make it to a form suitable for the Document Center (for example), but it might be a good starting point for you, if you really want to compile it as a spreadsheet.
Have a look and let us know what you think.