Lol @ Skysue: You are probably right about "be careful what you wish for"!!
Thinking back to my own daughter (she was the one who was over 15 months); we were getting frantic to see her walking. She really didn't walk much with push toys or anything, except cruise around the furniture.
When she started walking, she was practically running! We actually nicknamed her "Hurricane A------", because she was so busy!
Moral of the story: don't sweat it, if it's not a medical thing. She'll get there eventually. Chances are she will be walking by kindergarten!