We’ve been fans of Rain Design for years, though the company’s products have primarily been made for iMacs and MacBook laptops rather than iPods, iPhones, or iPads. So it was exciting to see the company create a new iPad stand called iRest ($50), borrowing visual and functional elements from its earlier iLap and iLevel laptop stands. Using three detachable foam pieces, iRest does double duty as a desktop iPad easel and as a padded lap…