There was an article a while back about what (I think) was a system to help people start new software projects. (Can't find it in the archives, it may have been voted down) The author of the article thought it would make an excellent addition to K5.
I was of a different opinion on the matter - it was a great idea, by itself, but did it really belong on K5? This seems more of a discussion-oriented site, and while such a thing falls into the "technology" portion of "Technology & culture", it seems to do so only barely.
I feel pretty much the same way about your proposal - it fits into the "culture" section, but not well. Instead, creating another website dedicated to this idea would work extremely well. Heck, it could even be scoop-based: it'll be to other online calendars what the K5 diaries were to other online diaries; you'll have the benefits of scoop plus the benefits of an online scheduler.