I don't know if this has been brought up or not, but I find it really annoying that I can't back out of the settings screen/cheats screen with a game loaded. Swiss will boot the game if I leave the cheats screen (unless an exception comes up) or if I leave the settings screen. So it's impossible for me to do both right now.
Any plans on fixing that? I would like to be able to leave both screens and then boot the game after. Seems odd going into a secondary menu that ends up loading the game after exiting it. Gives me no chance to change my mind on something. Once I save any settings or cheats changes, I either have to live with it or reset the gamecube.
Aside from that Swiss is working great for me. Except for my backup of Zelda Collector's Edition....It won't boot. Get DSI exception after Nintendo screen when trying to boot it from my 16GB MicroSD card. I think I did manage to get into the game selection menu when I first booted it on my non SDHC 4GB card, but it sits on black screen after selecting a game....
I plan on getting some mini-DVDs at some point. I heard those have the best compatibility when it comes to any games that use audio streaming.
EDIT:
Another feature suggestion I have. The ability to hide folders/files that have the "hidden" attribute checked in the file system. Aka, I would like to hide the "patch" folders that Swiss creates for some games. Swiss lets me move/copy files but not folders. Ability to delete/move/copy folders would also be a useful addition.
GCI save support for the emulated memory card function would be great to, but that's more of a longer term goal.