I'm just five feet tall, with 2.5/3 shoes, and am slender; I feel I've found my sisters here. 
Thurlow do not abandon hope re motorcycling! I had wanted a bike from my teen years in the '70's but couldn't afford one, so when I had a wee bit of money in my late 20's I went for it. First I had to do CBT (Compulsory Basic Training) and I hired a bike from the training centre. Well, that didn't work, CG125s were just uncomfortable (I hate them to this day...) and the 50cc was actually taller. :( So, no pass that day. However, I was soon introduced to the world of custom bikes! I bought a KC100 and had an inch or so sliced off the seat, and the seat re-covered; bingo! After I passed my Part 2, I went on to run a bog-standard Z250LTD (a factory-made "custom style") and then a Z650, a CX500, a CB550 and finally a Z1000, all customised. The CX500 was actually the tallest bike I owned; I took it into my mechanic's place for a fettle one day, and a massive bloke came over for a chat. He commented that he wished he could find a bike that looked as big under him as mine did under me! 
This was all some time ago, and many more women are into biking these days, so shorter people are more catered for. Harleys are often quite low, and there's a huge range of Viragos now. It does mean you're stuck with "custom style" rather than Power Ranger arse-in-the-air pocket rockets, but the wind's in your face either way. 
So, having said all that, I second all the comments about high shelves, mirrors and so on. My own contribution would be that I cannot turn off the driver's side airbag in my car (it's old). Which means that in the event of a crash that sets it off, my neck will be instantly broken, because I have to sit so close to the wheel... :(