craftgrrl | paper question

How would one go about making rounded corners on their book pages, and making all the pages look uniform and perfect? I'm wondering if I would have to hand-trim them all or if there is paper that is already pre-cut (or if I can get it done somewhere cheeeeap).

Thanks!

& p.s. -- One other question: What paper-selling sites do you recommend? I'm looking for some thick durable paper.. maybe like cardstock, but more flexible... and I'm also looking for not-too-glossy magazine-style pages to print on. Thanks a bunch of grapes! :)