I thought we were....aren't we? (then again, I can't even remember what I was trying to use...maybe it was that Nyanroll/Rickroll thing from some time ago...Actually, come to think of it, I don't think I ever got those two to work...lol so maybe it wasn't because of moonshell 2...testing time)
-edit-
Yeah, I just tried the Nyanroll thing again and apart from being awesome and working on YSMenu, it fails to work with the original moonshell 2 loader. Unfortunately, the file can't really help us find the actual limit...its like a 12mb file (the rickroll one is 24mb)...at least that is what the filebrowser on Moonshell 2 says. But they aren't exactly apps that have everyday use, so there shouldn't really be a problem (most homebrew apps are smaller than 2mb anyways). I'm so keeping the nyanroll and rickroll on my ds now lol.