Is there some way to connect a bunch of (fast) storage? I know that I could connect an external hard drive, but wouldn't the read/write times be too long? Also, is there some way for the board to take coax input? what sort of software would I put on it? Is the limiting factor the 512 MB ram? It feels like this should be doable but I'm not too well versed in DVR tech as I should be. Any tips or info?