Gentoo Linux has had a rough time of it the last few years. James Bellenger has briefly detailed the migration from Gentoo (See Table), and some reasons why it is occurring. He wonders where all the Gentoo users are going.

Matt Asay at CNET suspects Ubuntu's rising star is responsible for the exodus rather than Gentoo's lack of strong leadership.
Having used both distributions extensively, and strongly preferring one, I agree with Asay when he says that given Ubuntu's popularity, Gentoo's stats seem far less impressive. That could be said about thriving distributions when compared to Ubuntu.
However, an average Gentoo user is usually not asking the same from his machine as a typical Ubuntu user. That is not to say that all Gentoo users are power-users, or that Ubuntu users never want to get under the hood. Still, there is a very different approach to what role the operating system and installed applications play in each distribution.
I used Gentoo for the better part of a year. It is not a distribution that just works from the beginning. It's not designed to be. I learned to appreciate the first-rate documentation (which is very applicable to issues one might have with other distributions) and the fact that I rarely needed to ask for help on forums because the Handbook was so complete.
I stopped using Gentoo the day I truly broke something, and I just didn't have the time to work out the fix or re-install. Ubuntu wasn't the destination then, though I have used Ubuntu for long stretches since my last Gentoo installation. I don't have strong feelings against it, but I don't feel particularly warm toward it, either. Most of my computers run distributions other than Ubuntu.
I am willing to bet many former Gentoo users have similar stories. It is a considerable investment of time to do a re-installation if something on a Gentoo machine (hardware, or software) goes badly enough to require it. It usually has to be something catastrophic to get Gentoo to this point, but these things do happen. When the time involved is coupled with that uneasy feeling that the project has an uncertain future, and those at the helm aren't sure where to proceed -- it is necessary to look at other distributions.
Ubuntu is ubiquitous, a quick install, and works in a pinch. I am sure I am not the only former Gentoo user who has used Ubuntu intermittently, but prefers some other distribution on a frequently used system. I am sure I am not the only Gentoo user who would make a time investment to re-install if only I had a little more idea of the direction the project was taking.
So what are all of you former Gentoo users running on your machines? What would it take to get Gentoo back on your computers?