Ladies bikes

So I've (sort of) been green lighted to get me some gears (woo!). I would like a decent ish road bike to take to the Australian flats where they have an awesome stretch called Beach Road that can go on for miles and miles (kilometers). So I'm looking for advice on what to get to fit a woman with long legs and short body and what groupset for my tiny hands so I can reach the levers.
I'd like some really nice alu or semi decent carbon, not too tight as I'd like to go far, but not too relaxed as I'd like to do some nippy stuff too.

Secondly, does anyone know of any decent websites / forums to find second hand womens bikes?

Lastly, Julia, are you ready to sell me your Pinarello? ;)

I <3 bikes.

PPS, sorry about the avatar, it's an in-joke.

I can't really advise on road bikes beyond the ones I've owned (although I loved the Pinarello when I owned it and Julia has made it substantially better so I suppose that's at least a relevant recommendation...) but I did just spend a while trying to think of decent websites/forums for secondhand women's bikes and totally failed to come up with any. I think it just requires a lot of patience and trawling through Bikeradar/BC classifieds etc. I got my Trek (this one) through the CTC forum but that was a bit of an anomaly; it's mostly tourers and hybrids on there. When I was looking for one I found a few on tri and cycling club forums, but again, they don't come up that often. Maybe someone else will have some more useful suggestions.

My Trek is awesome for comfort over long distances (till you start falling asleep at the 200 mile mark) and I have the same short body long legs small hands thing (or short arms, or something; I dunno); it has adjustable reach shifters but I haven't actually worked out how to set them up so I'm entirely comfortable braking from the hoods. I think we ride the same size so you're welcome to borrow it sometime if you want to.