Alcibiades
Plant Geneticist
It's when you're forced to 'click a link to help me out' several times a day that people get annoyed.As others have mentioned, getting Facebook integrated without big changes to the UI likely wouldn't result in many signups. Alternatively, it'd mean lots of abandoned accounts just sitting there gathering seeds (or likely not as nobody would have worked out how to cultivate land).
I just don't really think the game in its current format is very well suited to Facebook - the news feed integration stuff would be nice, but yeah; the majority of my friends list get pretty irritated with app spam. The other thing is that pretty much every Facebook game's raison d'etre is to spam the hell out of people's friend lists - all they really want is to grow and get more signups.
Keep it to a minimum, and it'll be fine.
This. There is also the embarrassment factor, I know a few people on here don't tell their friends about the game because it's sounds so silly, and many of us have bosses/family etc on facebook, and might find it embarrassing to have their gameplaying tendencies exposed!