I wouldn't be too worried just yet, you mentioned she is doing other things. Babies tend to focus more on one area of development at a time, for some they talk sooner others may walk early, for example. So it may just be that she's practicing her motor skills at the moment and she'll move onto communication after that.

DS didn't say very much (he said Mum and Dad but they didn't seem to mean anything to him) until he was just over one, then all of a sudden something clicked and he now has about 25-30 words.

What's her hearing like? Does she seem to understand some things when you speak to her? Respond to loud noises, etc?