No tablet is complete without some accessories, and Motorola's just announced a bunch for its new Xoom tablet. Those include the Speaker HD dock that packs a pair of speakers for hands-free video chats and media viewing, the "Standard Dock" that doubles as stand while it charges the tablet, a new Bluetooth keyboard that'll also work with your phone and, last but not least, a portfolio case that's available in both leather and "durable" versions. No word on prices for any of them just yet, but we presume they'll be released alongside the tablet itself when it rolls out someti