Bluejeans is a good option. I use it for my plasma that has BNC connections. They use coax so the cables are pretty stiff, something to consider while routing those cables.
DIY is possible but it's a good point re: the investment in tools. Sometimes the tools can cost up to $50, like my coax crimper.
How about this? Find long runs of RG6 or RG59 coax that are already terminated, something like 20' or more. Those'll have F-type connections, just like the coax for cable tv. Then get F-type to RCA adapters at radio shack. Overall that might be a little cheaper than bluejeans.
If you want something fancy that won't require you to tear up your walls, you can try decorp flatwire.
Decorp
You can do component, speaker, and power cables this way. GREAT solution if you use a ceiling mount on your projector.
