MediaMonkey is an AIO (all-in-one) type of program, which is generally preferred by casual users and hated by geeks, or at least by nuxniks. Linux peeps come from the old school of Unix philosophy, where programs where small is beautiful, and where each prog should do one thing well.
I’m kind of a tweener. I can see the advantages of AIOs and why they’re popular (e.g. iTunes). But they also add an additional layer of complexity to what is already complicated, are generally slow and bloated and buggy, and when there is a glitch, you don’t know what exactly causes it. Seriously, what do you do when WMP goes weird, aside from, well, reinstall it and hope Murphy is on your side? That said, MM looks pretty good, and is only 7MB, so I wouldn’t mind trying it out some time.
I thought it’s SOP for nuxniks to try first and ask questions later? And getting militant w/ vendors about Lin-specific support is so 1990. If it’s not there then it ain’t gonna. Anyway, whatever tagger you use, check to see if the RG tag is recognized in the Fuze by going to Track Info, i.e. select the song and click menu button. Should show up on 2nd page if it’s seen.