Programmers have interesting term “bit rot” which means that unmaintained program slowly dies. I often thought that posts on software are suffering from same.
What happens with post after it's done and published? Should reviewed program be followed or forgotten? Does new version deserve new post? Maybe they do but endless stream of updates without content is way too boring to fit in blog. Piling up updates in periodical digest (see popular blog www.ghacks.net for example) is best compromise I saw implemented… while most blogs don't even bother to do anything.
So after starting this blog I came to very same problem (from the other side of the fence) - how am I going to follow software after I am finished with post on it. I decided to borrow feature uncommon to blogs but very common to software portals - RSS feed with updates for all software featured here. It won't have post's content, only links to them and to download pages.
I think it is nice way to keep readers notified while not cluttering blog at the same time.
And of course usual feed with full post content http://feeds.rarst.net/rarst-posts