Mashable's Ben Parr sat down at CES with Phil Libin, CEO of Evernote, which is not only a TUAW favorite, but acts as your "external brain," saving little clips and bits of information both collectible from and accessible by any device you happen to have with you. We love the app, and while it isn't a Mac exclusive, there are both Mac and iPhone versions, and apparently they're doing very well. Libin tells us in the video that not only are they picking up five thousand users a day (!), but over half of their two million users are using the iPhone app [iTunes link]. As Libin says, the app is "very good" -- it's easy to use (and free), the iPhone's camera makes picking up even real-life scraps of information super easy, and Evernote is designed to share information back to your Mac. Libin says that "most" of the iPhone users do access their information back on other PCs.
Libin also talks about power users of the service -- there's one in the system that has over 80,000 notes, though due to privacy, Libin doesn't share what they're keeping in there. And apparently one issue they're dealing with is retention, even for people who have used the service. I can identify with that -- while Evernote is a great service, it's tough to remember that you can use it to remember things, and for that reason I think that even with two million users, it's still very underrated. Libin sounds like he's on top of things, though -- he promises that they're always working on not only helping users figure out how to use the service, but also in polishing it and making it even easier and simpler.