On topic:
I like the idea of a PDF lorebook. You know what else I like? For that lore to be
included in game without having to read forty thousand forum posts. Sorry about the yelling, but it would be seriously nice to have some context for some of this stuff. I actually like the AI War fluff, but since about 90% of it is in Chris's head or in random forum posts, well...
But as far as kickstarter advice goes, I would recommend the following:
1) Pre-plan and pre-estimate your stretch goals. "We'll need to spend a man-year if we want this feature, which translates into x hundred thousand dollars". Don't reveal them right away, but have that stuff ready to go ahead of time so you're not scrambling. If you blow past those, just say "the money will be used to further improve the quality of the game, focusing on the features we have already proposed". Battletech and Shadowrun Berlin/Hong Kong are your model kickstarters here (Shadowrun Returns is what I call a "learning experience"). No, I don't work for HBS, but I'd totally want to if they weren't across the country. Arcen already has the "communication with fans" thing down.
2) Have a gameplay video ready to go if at all possible. Hack something together that looks cool.
http://thedailywtf.com/articles/The-Cool-Cam comes to mind. There's no amount of excitedly talking about a project that's a substitute for a cool minute long teaser.
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Off topic credit card shpiel for those crapping on credit cards:
I've been paying off my credit card fully every month ever since I got my first one, probably about sixteen years ago as a snot-nosed college kid. It's not that hard (assuming you have a job and some self discipline), and it
a) builds your credit rating
b) puts a layer of separation between your money and thieves that a debit card does not
c) lets you avoid carrying large amounts of cash or using personal checks (euuugh)
The credit rating, you need to take out loans (including the mythical yet awesome 0% interest loan for car purchases) for larger things such as cars and houses. The latter of which my wife just would not stop yammering on about and not only is it nice not to piss away money for rent every month, but also the reduced amount of ear drum harassment is great for one's psychiatric health. Plus, you don't have to answer to some slumlord or "renters association" or whatever.