Wow. This is a pretty lifeless forum thread. Does anyone else have any codes to share?

Here are some codes that were current as of July 15. They are mostly good at "participating US locations". It seems like major hub airport locations are the best bet.

JU02F 10% Off Weekend Rental – Compact through Full-size
JU01C 10% Off Weekly Car Rental – Compact through Full-size
JU03E Economy Car $209.99 per Week (5+ days)
JU04I Mid-size SUV $179.99 per Week in Las Vegas, So Cal, Hawaii
AXCN 15% off weekly rentals in Canada paid with American Express

Florida Rentals:
AU1FL Mid-size Cars $54.99 per Day / $299.99 per Week
AU2FL Standard SUV $63.99 per Day / $350.99 per Week
AU3FL Standard Car $459.99 per Month
AU4FL 20% Off Weekly Rental – Mid-size through Premium

Airline bonus miles
AAWT Quadruple miles AAdvantage (American Airlines)
US10 Triple miles Dividend Miles (US Airways)
HA5 Triple miles HawaiianMiles (Hawaiian Airlines)
JL10 Triple miles Mileage Bank (Japan Airlines)
TRP2 Triple miles Mileage Plan (Alaska Airlines)
UAM9 Triple miles MileagePlus (United Airlines)
EK3R 250 bonus miles Skywards (Emirates) for 3-day rentals
EK787 1,000 bonus miles Skywards (Emirates) for 7-day rentals

I have details, expirations, restrictions, for each of these codes on my site.
http://www.theflightexpert.com/tag/dollar-rent-a-car/
Choose from either current discount codes or airline bonus miles.