All sites which don't have their own blog are notified of every blog post on blog.stackoverflow.com (which is run by SEI, not by the community, and contains both SO-specific and network-wide posts).
It's quite annoying to have irrelevant posts show up in the community bulletin (not to mention ones with titles in caps that grab everyone's attention). In this specific case, most of the people who see this won't be eligible to vote, and even if they were, you may not want votes from them (for an election, one prefers informed votes, not votes from people who visit the site once a year and have the bare minimum rep for voting). (See also)
The blog engine already has a tagging feature. I propose that the community bulletins take posts from blogs in the following manner:
- If the site has its own community blog, show all posts from that blog
- If the site is Stack Overflow, show all posts from blog.SO
- If the site is not Stack Overflow (regardless of whether or not it has its own blog), include all posts from blog.SO which aren't tagged stackoverflow