well pastries such as muffins n cookies n scones are pretty simple to veganify or find vegan recipes for. the more traditional and intense pastries, think french croissants etc, may be a little harder to make. www.theppk.com
is a good start for the basics like choc chip cookies (have made these before and they are amazing!) and banana bread (again, heavenly). vegan baking is alllll about trial and error, so save your best chocolate chips and whatnot for recipes you know will work.
i recommend Vegan with a Vengeance and Vegan Cupcakes Take Over The World, both by isa chandra moskowitz, for easy and delish recipes for cupcakes n shit like blackbottom no bake peanut butter and chocolate pie (so freakin good).
ive never really made any of the more complicated traditional pastries vegan so i dont really know about that kinda thing.