Jon more than makes up for us in sheer tenacity.
(Me, I try to limit myself to snide comments about WinXP -- justified. I proudly admit I think all WinXP users should immediately install linux.)
re: sigil on linux, the answer is of course to use DiapDealer's release. Same way calibre works fine using Kovid's release.
I suppose fragmentation is a concern. Maybe stickies for commonly-recycled info, say, running ADE through WINE, should suffice.