I have not seen user settings for the M13, probably because it just models stompboxes as opposed to amp/effects combinations. I normally just either listen to a song and try to derive what effects are used for find some resources on the net for what my favorite artist use and their settings. For example if they use a tube screamer; the M13 has an emulation for one.
I've built up a really neat scene that sounds like the beginning for "Good Morning" from "The Dandy Worhols"...
I agree about the forum. It's the most annoying forum I've ever used lol. I'm used to it now but still...
The M13 is easy. You'lll get used to it quickly if you haven't already. It's easy but it's awesome. The only place I've seen patches so far is at vettaville.nl, but they're just pics IIRC. I tend to just pick an effect I want to use, then tweak it a bit until I like it...just like a real stompbox. <3 my M13.