Surprisingly, I'll save money going to the new plan, if I figured out everything correctly. I'm going to go over everything with the Verizon employee very carefully before switching though.
Old plan:
My Droid 3 900 minutes $60, Data $30, Unlimited text $20
Dad smart phone add'l line $10, Data $30, Text $5
Mom "normal" phone add'l line $10, Text $5
Xoom Tablet $35 for 3GB data
Total $205
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New plan:
My Droid 3 $40
Dad Smart phone $40
Mom "normal" phone $30
Xoom tablet $10
4GB shared data $70
Total $190
I've checked through the last 4 months of bills to figure out our average data uses between my phone, my Dad's phone, and my Xoom tablet. And I'm supposed to be getting Wifi at work real soon, so that'll drop it more. But even if I bump it up to 6GB at $80, I'm still spending a bit less than my current plan. And I get my parents on unlimited texting.