Where can I go to look at Cingular plan rates for two people so I can compare it to other carriers?

Answer 1

http://www.cingular.com/cell-phone-service/cell-phone-plans/family-cell-phone-plans.jsp

Cingular's plans for 2 or more people are called FamilyTalk Plans. The link above will send you to a page that shows all of their FamilyTalk rate plans. They all let you keep your unused daytime minutes with a feature called Rollover, a Cingular exclusive, they all have free nights and weekends and they all have unlimited calling to all other Cingular phones.

For comparison sake, here's Verizon's Family plans:
http://www.verizonwireless.com/b2c/store/controller?item=familyShare&action=viewFSPlanList

Sprint:
http://www1.sprintpcs.com/explore/servicePlansOptionsV2/FreeClearFairFlexiblePlans.jsp
(scroll down to Fair and Flexible for Families)

T-Mobile:
http://www.t-mobile.com/shop/plans/default.aspx?plancategory=2

Beware of comparison websites. Only the individual company's websites give you the latest, most up to date plan information. It's after Christmas and there's a lot of special deals and promos going on that the comparison sites don't tell you about. Check out the links yourself and compare not just anytime minutes and price, but look at other things like what time does the free nights start, do you want rollover or not, what about free incoming calls, coverage areas, etc. Good luck!
By the way, I'm on a Cingular Family Plan myself with 3 phones and it's great ;-) I've had Sprint, Verizon and T-Mobile in the past (as well as Alltel) and I find that Cingular is a good price for what you get, what I need and has decent coverage. Verizon's coverage is arguably better but they make you pay for it. T-Mo has some cheap rate plans and short contracts but their coverage is bad, not as bad as Nextel though.