Thought not, just checking. It would be very cool if there were an optional (perhaps invisible?) postcode you could put in either to your profile or to a 'for sale' thread to be passed into some postcode distance API but it would probably be a lorra lorra work.
Another option might be to show location after the '[size=2][color=#A4A4A4]Started by [/color][/size][url="http://basschat.co.uk/user/3539-geofio/"][size=2][color=#A4A4A4]xxxxx[/color][/size][/url][size=2][color=#A4A4A4], 22 Dec 2013[/color][/size]' bit in the main forum view for the for sale forums only, but obviously that wouldn't be of much use with comedy locations!