yeah you can put ads from many ad servers like adbrite, bidvertiser, widgetbucks and more. It is nt a prob unless the publisher expressly prohibits from displaying their ads alongside adsense ads. Adsense has no regulations regarding tht....
The best option for this is to use one affiliate program only, If you think Adbrite is better, than use Adbrite on your site only. Adsense, bidvertiser, Adbrite, ... The way they work are almost the same.
No I'm not going to use more than one. (it would pretty much annoy users imho) Just wondering for future reference
adsense has specific rules as to what you can and can't put on your page, but the basic gist of it is you can't place any ads on the same page that "look" like adsense or have the save format. Like you can't put YPN ads on the same page, or you couldn't have adBrite ads that look like a particular adsense format. You can do contextual link text links, or widgets that don't look like adsense.
yes you can, but try not to make them both blend in and do not make them look like each other. Google will not be happy if you blend them together.
Yes, you can use other ad service ads, but those ads should not look like adsense ads where your visitors can be reasonably led to believe that they are adsense ad blocks, basically keep the color and size of the adblocks different from those used in adsense blocks