Actually, we already published
a blog post at the time, which did very well when it was reposted on social media last year (Michael did that, IIRC, and may have numbers still). So for that purpose, a new post doesn't really seem necessary.
How about writing a new up-to-date post instead that maps how Wikimedians have hold up and continued to be influenced by Aaron's memory, enabling us to incorporate information from after mid-January 2013? I could offer
some photos from Wikimania 2014 for illustrations.