I do believe Evernote should think about creating a client for Linux users. That does not only affect one user but may affect a whole company. For example, I know several companies that adopted Dropbox just because they offered clients for "all" the main operating systems. This is true specially for tech companies. If you are a CEO or CTO of a company and is a Linux user, most likely you will not adopt Evernote internally. So one KEY user can actually affect several others indirectly. My company uses Dropbox. We are a team of mac and linux developers. To be sincere, we could easily use other doc sharing service but we keep loyal to Dropbox just because they have a native linux client which works just great, and therefore the whole team is happy.