Can someone tell me in more details what is Google's policy on 'Competitive Ads and Services'? Their explanation is not all that clear to me. A simple question - Can I have ads from say Amazon, Clicksor and Adsense all on the same page? Thanks.
It would be best if you contact AdSense support with this query. I recently discovered that they have a whole set of policies which are only published internally and are not available (yet?) on their public web pages. That disclaimer being finished... I have AdSense and Amazon running side-by-side and Google seems fine with it -- because Amazon ads are not context-sensitive. I used to have AdSense running alongside Clicksor's underlines ads. Google had no complaints with it, but I dropped the program because the revenue was minimal and I felt that it lowered my AdSense CTR. I have also used Clicksor as AdSense alternate ads, but was disappointed because of the extremely limited number of relevant advertisers.
I also have Amazon ads and Adsense on the same pages. When Amazon changed their look of some of the product links to be more text oriented I emailed Google about it and they said it isn't against the TOS.
IIRC, G only say you can't have other context-sensitive ads. So if the ads aren't dependant on the content within the page they should be fine. As with anything else, if you've any doubt always email G first.
Unless there has been a recent change that I don't know about, you can't have ads that look like their's even if they are not "context-sensitive".