[tptacek]

My understanding is that the most important attribute of an A round is that it fixes a specific valuation on your company.

Lots of companies take numerous "seed rounds"; some are continuously funding during the seed stage. They're not out of "seed" until they take a VC round that imposes a valuation on them.

[mlmilleratmit]

It's also popular to price a seed round (from 500k up, in my experience) using the "Series Seed" legal documents that are close to boilerplate now. As a founder turned investor, it seems that those docs could be streamlined into software easily. Most of the terms are standardized at this point, aside from board seats.