Embedded Linux Hardware Resources

jessecurry writes: "I've recently come up with a conceptual linux based piece of hardware and have been able to find a huge amount of information regarding getting linux on to a device, but almost nothing about creating the device itself. I'd like to know if there are any books, online guides, or software that would help in designing a device that would accept some flavor of linux. I really don't want to go "off the shelf", but I need something that can at least display graphics, respond to positional input, and play sound. Also, is there a good place to have all of these components put together once I have a finalized design? I'd really hate to hand solder so much."