Looks pregnant, but not REALLY pregnant. I agree with Heather on a week or two before seeing fry. Here's a picture of my female guppy 2hrs before she had her fry(just to show you how large the belly can get):
looks like she's got a bit to go then.... Going to have to put the fry in my new tank....which isn't as yet cycled... will have to hope it's nearly there when she bursts... lol