You know all those apps y'all are playing with on Friendface? (Farmville, for instance, just leaps off the page[1])
Check here to find out how secure they are:
http://theharmonyguy.com/ I mean, you'd be, I don't know, a prize lackwit to use the same p/w / username combination on Friendface as on Paypal or your online banking, Amazon, webmail...
... And as for passwords of the form [dictionary word][number]...
Bonus URL:
http://countermeasures.trendmicro.eu/two-more-rogue-facebook-apps-linked-to-fucabook-scam/ [1] ... And has apparently been secured.