Congratulations for this great plugin!
Would it be possible to use the standard Facebook Connect button (the wide blue one withe the Facebook logo on the left)? This is because, from a user's perspective, using the official Facebook rendering of the Connect button inpires more confidence. Users are most often reluctant to use Facebook Connect if they're not certain the site they're giving permissions to is trustworthy.
In short, would there be a way for me to call the fb:login, by changing something in the plugin code?