Typically 2-3 weeks before the street date for pdf access; you get access to pdfs when your order ships. Check the stickies in the customer service forum for exact dates for any given month.
Right here. It should be at the top of your Messageboards page, unless you've got it closed and hidden somehow. The monthly threads with estimated shipping dates are stickied at the top, though I don't believe June's thread has been created yet.
A word of caution: while subscribers often get their PDFs before street date, they don't always. There have been some busy con-season months where subscribers complained that their orders didn't ship until after people could already buy the print edition in stores. That's why Paizo doesn't explicitly offer early access as a perk of subscription: it often works out that way, but it's not guaranteed.
