The installation process is really simple just install Wine and download Evernote 3.1 for Windows (not the beta). Next just type in
wine ~/Downloads/Evernote_184.108.40.2065.exe and follow the normal installation process.
Evernote is really cool, but as you can see from the screen shot above, it doesn't look so good. But I am impressed though that Wine added the Tray icon to my Gnome notification area.