While it's easy to sum up Griffin's Tablet Stand ($30) as merely a gray and black plastic version of the company's earlier aluminum iPad stand A-Frame, the reality is that A-Frame was a nearly great option, undone only by its rough edges and slightly underaggressive asking price. By rectifying both issues, Tablet Stand manages to eclipse its more deluxe predecessor while still offering the exact same functionality: it folds down to a nearly flat shape…