1) When it is ready. I've finished my check of the PDF today. While that isn't an official milestone, it basically means that the revisions can be made with confidence that the vast majority of corrections have been identified. That could still take awhile. Then, there's the various hoops to jump through to get it from revised to ready to be printed. But I expect it'll be less than a month, now.
2) That would be Core Law, the skipping GM Law part. Already out there.
3) Creature Law is coming. In the meantime, make some stuff up or modify RMSS stats. Or you could use the Beta Creature Law. If you find that there is a particular creature you're having trouble expressing in RMU terms, ask. I'm sure you'll get advice and some of it even helpful.
4) What do you mean? There's only one skill involved, so it's already greatly simpler than RMSS/FRP or the more skill-heavy options in RM2.
5) You can print character sheets from Core Law, though there are a few independent sheets floating around. They haven't been formats useful to me, so I haven't kept track. I'm sure someone will point you to one soon.