There are a number of bits of software out there which enable the 'automatic' placing of adsense like panels which lead to Clickbank products. (e.g. havads)

Are there any similar ones for PayDotCom?

I'm not sure if it is what you are looking for, but, doesn't PDC provide Widgets that you can add to your site or blog. I'm pretty sure you can customize them to your niche. I received an email about them a couple of months ago and forgot all about it until I just read your post.

Basically you're asking for a script that will display paydotcom ads on your website, correct?

In essence - yes. I want to supply a keyword and have the ads created - in the same way that adsense does.

Blackberet - I'll check it out. Haven't heard of it before

I've checked out the PayDotCom widgets - trouble is that the only difference in them is colour. They are all the same size and come with a 'frame' that is pretty appalling. At least the clickbank alternatives give a fair choice of format. If I'm stuck with one of those then I'll use it - but I would have thought that someone would have seen a gap in the market there.