The Open Brand: a framework for defining brands
dcurt.is
dcurt.is
Any advice-giving blog post that the author intends to have a long shelf life ought to be a Github repo. It allows for updates in the future with a clear version history. And, more importantly, it allows for others to make suggestions and contribute to the body of advice via pull requests.
Still, great advice. Using "vector-in-psd" rather than Illustrator is particularly clever.
Just use SVG as the file format, then any browser can open it.
Sites that just need to put a brand logo up as part of a content update are just going to resize the logo from available PNGs.
I imagine in any more complicated cases someone with Illustrator is doing the job.