Do you spend your days desperately awaiting credit card bills, coupons to Pizza Hut, and reminders from your dentist's office that it's time for another cleaning? We've pared down our dependence on USPS, but for those who still get physical communications of note, Make has developed an Arduino-based mailbox mod that sends push notifications when the post is in. Back in 2005, we saw a clunky device called POSTIN that did much the same thing. Thankfully, this system doesn't require an extra gadget, instead it sends messages straight to your iPhone. The postal alert system
