My 19 month old DD still doesn't say anything apart from mama, dada and up.
I think she is really advanced in other areas understands most of what you say to her. She eats using a fork/spoon, can dress/undress herself and is very independent but it really frustrates me that she doesn't speak. Today she had a book she has never seen before and was sitting up "reading it" there was a lion on the page and she pointed to it and growled like we do with her toy lion. She also knows all her animals in her Noaks ark but never attemps to say their names. She does constantly chatter away in her own little language though.
Please tell me I'm just being paranoid, I was an early talker (probably according to my Mum was saying sentences at 12 months and was potty trained too!!!) DP was a late talker according to his mother.