@tbol13 and don'tcompromise
Please note this:
What is Google Adwords?
With Google AdWords, you can create and run ads for your business, quickly and simply. Run your ads on Google and our advertising network -- no matter what your budget, you'll only pay when people click your ads.
AdWords ads are displayed along with search results when someone searches Google using one of your keywords. ...
http://adwords.google.com/support/aw/bin/answer.py?hl=en&answer=6084
Using a wordpress.com blog to drive traffic to third party sites
What does advertising do? It drives traffic to third party sites. Can we use wordpress.COM blogs to drive traffic to third party sites? The answer is "no". Section 2, 5th bullet down of the wordpress.COM TOS states that we cannot use wordpress.com blogs to drive traffic to third party sites.
http://wordpress.com/tos/
Can bloggers initiate advertising on their wordpress.COM blogs?
The answer is "no" and doing will result in suspension or deletion of the blog. The only exception is for VIP hosted accounts.
References:
Advertising is NOT allowed on wordpress.COM blogs.
no blogger initiated advertising allowed http://en.support.wordpress.com/advertising/
types of blogs allowed and not allowed http://wordpress.com/types-of-blogs/
VIP accounts exception http://wordpress.com/vip-hosting/
If you are in any doubt, please contact support for clarification. http://support.wordpress.com/contact