Off the top of my head, I can think of these questions that would probably be good ones to have in the FAQ. I'd also suggest that all the questions need not have answers filled in yet when you first post it. If you leave questions in the FAQ without answers, I'm sure plenty of people here can let you know what the answers are.

Basic:
- What is Hijack?
- Where can I get Hijack?
- How do I install Hijack?
- What is AutoHijack?
- What version(s) of Hijack will work with my MkX running Y.Z beta Q?

Using features:
- How do I access Hijack via my web browser?
- How do I upload files using Hijack's ftp server? (since the empeg is mostly ro, this question should probably be included)
- Can I use Hijack to listen to music via the web?

Configuration:
- How do I configure Hijack differently for AC vs DC power?
- How do I configure Hijack differently at home vs at work?
- How can I redefine what the buttons do?
- How can I make Hijack work with my Foo brank Frobber Stalk?
- Can I use my Palm Pilot and/or WinCE device to control my empeg?
- How do I keep other people on my LAN from messing up my empeg?
- What other options does Hijack have?

Misc:
- What do all the things in "Vital Signs" mean?
- Can I load kernel modules?
- Can I install or update Hijack via Ethernet or USB?

I'm sure there's many more good questions too!