Cobalt (in Texas) = $40.80 + $10 local fee + $2 online "convenience fee" + $1 postage to cover sticker mailed to the house.
Pathfinder (in Texas) = just bought, so who knows on renewal. I did get a $67 refund check for overpaying initial registration fees though. That was cool.
Miata (in Florida) = $92.30 for 2 years (could have done $46.15 for 1 year, but fees were going up about a week after I registered, so I went for 2 years)