This is awesome! Right now Amazon is offering a $5 Amazon Video Credit for linking up your compatible device! Just go to the link and follow the instructions (I have copied them here as well) to get your credit!
Amazon’s new releases are $3.99 to rent, so you will get at least one free rental. Look around though they have some fun and interesting stuff.
Offer expires on September 30th (but don’t wait, you might forget). Your will have until October 31st to use your credit.
Here is the info from Amazon:
Amazon Instant Video: Compatible Device Linking Offer
To receive this promotion:
1. Register an eligible Amazon Instant Video-compatible device with Amazon Instant Video for the first time by September 30, 2011.
Eligible devices for this promotion include Amazon Instant Video compatible Vizio HDTVs and Blu-ray players, Samsung HDTVs, Panasonic HDTVs and Blu-ray players, and Roku streaming players.
2. Your credit in the amount of $5 will be automatically applied to your account after successful registration and will automatically be applied to your purchase or rental of eligible movies or TV shows. This credit will expire on October 31, 2011.