Well, long time no post - apologies.
And it's an interesting point: when should you post to a blog, how often do you need to keep coming back to add new content?
Blogging is becoming more frequent here at work, and one of the issues that we're facing is what is an acceptable level of activity before we step in and say that a blogger needs to do something to keep it alive.
Maybe we shouldn't do anything...? The content that's already up there may be relevant to others, and that it's not being updated any more may not necessarily be an issue.
We're still working our way through this. There probably isn't a correct answer, and we're probably going to have to just suck it and see.