I've used euae on my linux box for awhile. I have it start os3.x amd I have something like like 5,000 amiga games, thousands of amiga apps, and 5000 amiga demos on that install.
I keep a backup of the amiga folder on a 16gb usb thumb drive so I can use the same amigaos install on any other machine. Its nice.
I have been meaning to get a huge collection of adfs so I can just start games/apps and so on straight from the linuxs desktop without going through amiga os, but I suppose I kind of like the amiga os install. My more commonly used amiga stuff should be installed that way though, because takes awhile to navigate through everything otherwise.
I have not seen this fs uae before, I'll give it a try.