Tessgirl, there are a ton of other caluclators out there that you can use to calculate your RDI and just plug it in manually. I like the one at freedieting.com. 1700 cals does sound a bit high for you at that weight. I'm at 170 and average 1700-1800 cals a day.
Fawkesmom, 1500 sounds WAY low for you. Be careful about those generic recommendations that are given out. 1500 seems like one of those numbers that sticks in people's heads but I weigh nearly 100 lbs less than you and don't consistently eat that low! My guess is that at that calorie level, you'll lose weight for a while then stall and have to increase your calories to get moving again. Log everything and monitor your results- by looking at my own results, I've seen proof that I am more successful at losing weight in months where I'm eating a little higher and not sticking to rock-bottom calorie levels. Pay attention to your own data if you get stuck and see what's working for you. Also, be wary of going over 2 lbs a week average weight loss- when you're eating so low, you have to be careful that you're not losing muscle in addition to fat. Making sure you're getting enough protein in those cals will also help and if you can, monitor your body fat percentage.
I find that the right number of calories is a matter of trial and error- start with a number generated by one of the calorie estimators and then stick with it a couple weeks to see how it goes. Another trick is to vary your calorie intake from day to day. I avereaged about the SAME number of calories daily in September and October- lost nothing in September and lost aobut 4 pounds in October (before I got sick and lost a couple more because of that). The biggest change: instead of eating in the 1700 cal range everyday, I started doing two 1500 cal days and then eating over 2000 cals on the 3rd day. Changing up your calorie levels from day to today is an approach called calorie confusion and helps to prevent your body from adjusting your metabolism to fit with the lower level of calories as it naturally does over time. There's no one way to do this and freediet.com will give you a zig zag schedule- I picked my particular approach because it was simple and gives me the flexibility to plan my high cal days for when I can best use the increased cals (like going out out to dinner).