Here’s one for the books. You know how everyone’s always pre-announcing their stuff? Well one company is taking a different route, and actually launching a product in stores available to the public. This refreshing approach comes to you from Parallels, the Windows-on-a-Mac virtualization company. Amazon yesterday dropped the price of the previous version to $20, and today the new software is on shelves without so much as a press conference. Even the company’s website is still promoting version 5 of the software. Does this company not understand how the tech industry works? Do they think they’re…