DNS setup for Amazon AWS

So, I'm setting up an Amazon AWS account for Attraction to handle their multi-site installtion and I see that I have to use a 3rd party to handle my DNS. I'm used to my webhost providing tools for that so this was a bit of a change for me.

I wanted to know what you folks over at ActiveLAMP use? (Or anyone else for that matter)

I was looking at dyndns.org ($15/yr for 25 domains) but wanted to know if there was a better/easier option.

Thanks!