LCDproc is usable, with a few restrictions, I think!
A few month ago, i connected a 4x20 HD44780 LCD to my pfsense-pc to parport, using std-winamp-style. But, IIRC, the lcdproc-pkg was built for FreeBSD 5.3?
So I endet in building my 'own package' on another BSD-machine. Transferred to the pfsense, it was working (CPU, Mem, Disk), except of everything that depends on network-data. So the Problem may be the (not) pf-specific code of LCDproc? Because of having no deeper knowledge on BSD's, I did no further testing. But nevertheless I think a Status-Display would be very nice to have…