Any success with multiple Adsense sites?

[rehabguy]

Google acts as if it's perfectly fine to be approved for one web site, yet paste your adsense code on others. See FAQ #4 from Adsense:

4. Can I show ads on more than one site?
Yes, and you don't even have to let us know because we'll automatically detect new sites that contain the AdSense ad code. The HTML code we provide you with is valid for any page in any site on which you want to display AdWords ads. However, you may only place the AdSense ad code on sites that comply with our program policies and that you own or are legally authorized to act on behalf of for the purposes of Google AdSense. We also monitor all sites in AdSense to ensure that all pages displaying AdWords ads comply with our program policies.

Has anyone been successful at using the same account and code on multiple domain names? Are there any special conditions, punishments, downgradings, etc for using the same adsense code on completely different web sites with completely different topics?

[figment88]

I believe this is very common. Google encourages. I have the same code on several sites. The main drawback is that the reporting tool currently gives you no indication of which site generates clicks and revenue.

[JohnKelly]

As long as all sites comply with the TOS, have their own domain name, and you have control over the domain and site content I don't believe there are any problems.

Downside is that you cannot track how each site performs with the stats that Google provides.

[Mauricio]

a) There is a lot of people with the same code/account on multiple domains; just follow the rules for the site you've applied
b) As Adsense doesn't gives per domain stats, nobody knows the exact performance.

<edited>Ooopsss... three answers in two minutes... great!</edited>