Hold on there! I do have plans. LittleFM's "killer feature" is the ability to save songs into flash. However, it can also load songs from a file - just like LSDj's own manager - but faster and more safely. The goal is to make it a full drop-in replacement for LSDj's file manager, so it can also save and delete songs. This is something that can be done with an EMS cart, or any other cart, even if the save-to-flash functionality is missing.
But, there's more. The EMS cart, just like most others, has 128 kB of RAM, while most games use only 32 kB. Nothing (except for laziness) would stop me from saving a game save as a file, much like a LSDj song. There would be some complications, like the need to patch game ROMs with a little piece of code, but in principle it's still possible.
But wait, there's even more! Order within ten minutes - I sad ten minutes...! Just kidding. But a well hidden secret (I suppose?) is that all EMS cartridges (both old blue and USB ones) have multi-ROM support. This is separate from the "two pages" thing. This means that you could basically fill up the whole ROM area (2*32M) with programs, provided that
1) There's a program to take care of the special bank switching needed.
2) RAM sharing is taken care of where applicable.
Point 1 is the big problem. There used to be a menu ROM for the old blue cartridges, which worked fine, except that it worked particularly badly with LSDj, which made it fall into obscurity. A main candidate feature for LittleFM, even if it will take some effort, is to implement multi-ROM support for EMS cartridges, that is compatible with LSDj. That way, LFM could offer something unique to EMS users. Additionally, I could very well add extra features, such as the ability to get back to a menu with a choice of games/programs by pressing sel+start+B+A, basically a soft reset feature.
Now, convince to actually sit down and do it.