In the end we come down to an unfruitful debate on the distinction between 'idea' and 'execution'. If you've got every last detail for a website planned out in your head but nothing implemented, that's still an idea, not execution.

In my opinion it goes like this:

* A bad idea is less than worthless

* Unoriginal good ideas are worthless

* Original but vague good ideas are worth very little

* Original and detailed good ideas are worth a lot, but still useless without fantastic excecution too