Found this website which does a reasonable job of converting an Excel spread sheet into a BB table ...
http://theenemy.dk/table/It would appear it can't do boarders and shading and if the first row and first column are headers, you need to put some irrelevant character in the top left cell, or modify the BB code to give an empty cell.
It won't pick up wrapped text either ... you have to force a line break by inserting
br enclosed in square brackets at the appropriate place.
