Hmm... sometimes a "girls division" of a group can be a net plus. "linuxchix", "geekgirls" and "devchix" are also strong, enjoyable groups that tend to hang off the larger mainly-male groups, to the benefit of all.

Of course, the opposite is also sometimes true... but would it hurt to start up, say, "LW girls" or similar?

Anecdote: the annual linux.conf.au that was held in Sydney a couple of years back had the highest female:male ratio of any linuxconf.au so far (1 in 10), and that was due to the extremely strong support from the local linuxchix chapter. It took a local hero (Pia Waugh) and friends to make it happen... but it did help