Did you make sure that you dont have an old default route on the "other computer" that's not pointing to the pfSense?
There aren't any routes on the computers present.
But just solved the problem, seems that the crosscable I used doesn't work completely with a 100Mb NIC, hooked it up to a Gb NIC, and then I could access the webinterface :)
@Cry:
(Hint to developers: make some errormessages, then it would be easier to figure out what's wrong ;) )
Of course, if you can't connect to the console, how are you going to read the error message?
Uhm, good point…
(Let's just blame the heat for me not thinking straight today ;) )
edit: can't the bootloader give errors before VGA get's disabled?