Oooh, MaryK - you beat me to it! Petite Early Morning Style was going to be my first suggestion, too! I cannot BELIEVE how many clothes that young woman seems to have in her wardrobe, but she puts them together in terrifically fun ways and does a lot of remixing. Plus, although she is several inches shorter than me, her measurements are very close to mine, so if something looks great on her I can imagine how it might look on me...minus her gorgeous face and youth, that is.
Another that is great for petites especially, but for anyone, really is Alterations Needed. http://www.alterationsneeded.c.....urces.html
I especially like the resources section, because she discusses fit issues, easy and more difficult alterations, and brands that work well for petites. I am really only on the cusp of petite in terms of height, but my frame is small, so I find the advice often applies pretty well to me, too.
The other one that many here know about is Academichic: http://www.academichic.com/
Why do I like? Because they see no contradiction between being smart and having fun with fashion. And because they do not spend a lot on their clothes but still look put-together.