Just a couple of thoughts on the 'B' opening the source menu issue. I have an interest because it was my idea - at least, I was the originator who invested a lot of time in getting it to become part of wiiflow. My original point still stands, I think - that it 'feels' like moving 'back' or up the folder chain - because this concept of 'B' moving backwards is used in most wii game menus and interfaces. It would be a shame to see it go, although it's useless to anyone who doesn't use the source menu.
More people would use the source menu (and none of the devs do, last time I checked) if it were a coverflow with 3d covers (a "sourceflow").
It would just feel like part of wiiflow, users could simply add and remove the sources displayed from within wiiflow and covers could be downloaded directly from game tdb.
You could even have the games coverflow disappear into the distance as the source covers appear from behind*, give a sense of movement between 3d 'strata' or "folder levels".
FIX94 Perhaps this could even be integrated into the new explorer!!!!
It's a real shame that the source menu is a 2d menu, I think it really lets down wiiflow as a whole. Especially when there's a whole beautiful 3d cover display system RIGHT THERE!
n.b. I love the wiiflow, and thanks, as always, to the developers.
*or 'warp speed' wait animation!!!(elite, anybody?)
EDIT: Perhaps wiiflow could check for folder structures/roms on first boot and then decide which sources to display.