I agree with the position posted by others that any artificial barrier be removed (whether gender, nationality, religion or other basis). What we should not do, however is artificially try to adjust the numbers if it seems that they are not 'quite right'.

Choice of carreers is only partly based on ability. Other factors may be cultural, or competition from other career opportunities that may be more appealing to some for reasons that are not really quantifiable.

As to 'geekness' (which represents only a small but visible subset of intelligent people) is an outgrowth of a kind of obsessive behavior that is simply (and probably biologically) more common in young males than in young females. How many young boys come to the computer field by becoming obsessively involved in hacking their own machines and computer games, while young girls their age find many more varied things to do than obsess in their parent's basement?