Tomato plants do better not getting dry. She may want to water them twice a day. If she did not use soil with a slow-release fertilizer in it, then they may need fertilizer too. To make them bushier, she should be pinching off (or cutting off) shoots. This also helps the rest of the plant with water. Here is a link that may answer some of your questions:
http://forums.gardenweb.com/discussi...s-not-blooming