I offer this as a service and I can say that link wheel when made respecting some criteria they do work.
How I can tell?
On the latest page rank on 31 dicember all my website where I was doing link wheels for they all gained on PR
Whereas the ones where I was doing different backlins campaigs, I did not find great improvements.
Another tecnique that definetely works very well at the moment is forum signatures,
obviously if implemented on your link wheel that is gonna add even more value to it.
Just make sure you do use unique content and be cafull with footprints.