feature suggestion: "recycle" or "bump to top" for old postings

I think Imzy should have some sort of "recycle" or "bump to top" feature for old postings. The way it would work is that after a given amount of time (for example 4 months) you are allowed to recycle an earlier posting (so it will in effect appear as new throughout the Imzy ecosystem, it will be pushed to the top of the community feed, while any earlier comments made will still be kept). This way one can hope to generate new debate on the same posting, keep the community tidy, and also make it easier to introduce your favourite postings to new users. It will also have the nice side effect of making it appear to the new users that new content is generated all the time.
This is just a draft suggestion, but you get the idea :)