Well I realized I don't need to spend 20 hours unlocking Prototype mode in Ikaruga to add my net ranking. And I was able to get almost 500k on the Challenge mode. Problem is the net rankings only go up to 100th place, which is around 1mil right now. I doubt I'll get that, and when I do, you know the scores will be higher anyway. I'm not sure why they don't have your ranking vs everyone. Even if I'm ranking 502nd, I'd like to know it.

Also, someone tipped me off on how to figure out which MAME ROMs I have extra clones of. See, most clones are merged w/ their parent set, but you can still have separate clone files in your ROMs folder. Problem is, MAME won't tell you there are two files, it just counts it as one. There's an easy trick in MacMAME to tell which clones aren't merged (hide virtual clones, but show physical clones). It's so easy it makes me feel like an idiot, but at least I was able to trim some fat from my collection.