Just switched to Verizon this weekend overall, should save $30 / mo for two lines, get tethering finally, unlimited everything AND add an unlimited tablet sim! Yup for about $20-$30 less than I currently pay.
Only thing now is this darn activation fee for switching.... hrm
I made the switch to Verizon too from the grandfathered AT&T unlimited over the weekend. Luckily I was able to get my brother to switch from their 8GB Verizon plan to unlimited, and I jumped on as the 4th line, so I'll be saving a good $40-45/month. That will come in handy once I upgrade to a new phone in the fall...and I'll still probably come out a few dollars ahead.