It would also be nice to allow HTML for ads. It only allows a destination but some companies use a third-party ad service that they want to use and allowing HTML allows for this. I only have one that uses it but it's worth a thought.
Also, are there any stats for the ads? I'm having many issues getting this to work but I didn't notice any stats.
If you need any help developing this let me know. I may just modify this for my needs and fix the minor bugs.