I'm also hoping to find out whether or not it's possible to get calibre server to run on OpenWRT. I just recently through together a Piratebox router/AP (
http://daviddarts.com/piratebox-diy-openwrt/) and did try to use the command line install of calibre on OpenWRT just to see if I could even get it to DL and install, but I had a problem getting calibre to even DL (ran out of RAM - probably need to mount the USB drive and point my temp directory to that to DL the entire calibre package).
Anyhow- I don't even know if it's possible to run it on OpenWRT - but if it was - that would be great to be able to just run the calibre content server off off a mini router and USB flash drive! (I've used a
TP-link WR703N and been impressed so far with it, considering it costs $23 USD and only draws about .5 W!)
thanks for any advice!