It's a great college - seriously. Lovely gardens too!
Just to get rid of two issues that people seem worried about: bitchiness isn't something I've noticed at all, and very few of us are actually rampaging feminist lesbians - despite what musicbloke might say!
There are blokes in the university as a whole, so you'd be socialising with them in any univeristy-based thing you chose to do. There are plenty aound, and there will be no problem whatsoever meeting those with the Y-chromosome. Promise.
If you look down the list of new threads there's one started by Bumblebee3 about Newnham (it'll be on the first or second page). Probably the best place to ask questions/talk to Newnhamites!