I am paying Verizon $4.95 a month to have my land lines forwarded - a total ripoff but not surprising from Verizon.
I have to pay the minutes for my cell phone calls forwarded, but I've got a large(ish) plan so it's pretty invisible since I'm making <50% the calls I used to make.
I just thought the part that was cool was that the network spanned 9K miles in less than a second.