kimberely, read the book I mentioned in my post, it's great on explaining the benefits of weight lifting for women. It also has a six month work out program included, it helped me learn a lot.
When you build muscle, the amount of calories you burn while resting raises making weight loss quicker, you have more 'afterburn'. With cardio your mostly just burning at that moment, with weight lifting your burning for hours after. You also shrink and lose inches quicker, if you have enough protein for your muscles to heal. I have definition in my arms for the first time ever, I can see muscles in my back and it looks slim and sexy. I never knew exercise could make me look like this! I also feel great, I feel strong, I feel like I've accomplished something. It's great to get stronger and increase your weights as you see yourself get smaller!
A lot of women fear they will get 'bulky' but it's pretty impossible with weight lifting unless we take something to 'help' like steroids. We don't have testosterone so it is harder for us to build muscle. You should check out the weight lifting part of the forum as well, it's great.
There are soooo many benefits. This is just a quick run down though