Who's foundation? I'm a web developer, so to me, I want the latest ruby, apache, etc... However, a server admin might want the more "stable" versions of the same.
I know that Gentoo, at least, has the facility to accomplish this. They have package masking, so you can specify exactly the packages you want to be kept on the bleeding edge. Taken a step further, you can set up your own "profile", and list exactly what version of each package in the system you want. Arch Linux provides something similar; you can list what versions a package shouldn't be upgraded past in a config file.
I'm sorry, but there's nothing "easy" about having to watch 50 RSS feeds or twitter uses to know when there's a new version of an app I might want, downloading it manually, and clicking next through their installer. Setting up a few config files and doing `pacman -Syu` is orders of magnitude easier.