Maybe it's a bit early to start thinking about what to do this weekend, but I'm going to throw an idea out to you anyway: the New York Center for Independent Publishing (you once knew it as the Small Press Center) is holding its annual book fair this Saturday and Sunday at the Center's headquarters (20 W. 44th). Over 100 independent presses will be taking part in the vent, and guest speakers include Fugazi lead singer Ian MacKaye and Nation columnist Katha Pollitt. And who can resist the allure of a literary trivia battle between the staffs of A Public Space and The New York Review of Books? If I were going to be in town this weekend (and you'll hear more about that at the end of the week), I'd either be in the front row or begging Brigid Hughes or Edwin Frank for a temporary hire...