After almost 10 years of using only Debian/Unstable, yesterday I have converted my last laptop still running Debian to Ubuntu 8.10.
Now I have 2 laptops and 2 PCs and keeping them updated was becoming a chore.
Ubuntu looks acceptable and even though I will not have the cutting edge any more, having a stable distro that is not older than 6 months at any time outweights this.
In addition, in the past couple of months I've discovered that I have to compile by hand, from sources, some of the libs I use, even on Debian/Unstable. The same as on Ubuntu.