I haven't seen them, but I applaud the idea. The Series AA documents we and WSGR produced have been used by many startups and have saved them a great deal of time and trouble.

http://ycombinator.com/seriesaa.html

The Series AA documents are intended for angel rounds, whereas it sounds like the Series Seed documents, despite the name, are intended to be used with VCs. It could be harder to talk VCs into using standardized documents, but it would be great if that happened.