Actually endorsement/smorshment... what we really need is killer apps for bitcoin. The facebook micro-payment idea really is one of the best things I've seen so far to drive users to Bitcoin, making our "stock" go up

I concur that a killer app is necessary. I personally have never paid any money for anything on facebook. Is there a way for us to assess the market? Are any facebook app developers out there actually profitable from their internal currencies? If so, who?
I'd like to know how much USD is currently flowing through facebook applications. If it's substantial we actually could have a very good value proposition for the developers, by decreasing their dependence on PayPal.
A rule of thumb floating around out there is that a Facebook app user is worth $1/year. I've had a few apps and those that we tried to monetize actually peaked at $1/user/MONTH. Too bad we didn't have more users.
So yes, there is huge money in Facebook apps. That's why Zynga is a $5 billion company. By these metrics Farmville alone is taking in $50 million/year, I'd bet they're monetizing at better than average.
I remember when My Aquarium launched in summer 2007 (one of the first apps), it was grossing $3000/day. For a virtual fish tank. Go figure.