Someone who knows how to find and remove a virus from my server

[Dr Bizzaro]

Something got into my server or into one of my sites and is randomly linking to some sort of download program or something.
I get reports from surfers (and sometimes other webmasters) every day about it, so I know it's there.
Although it must be outputting at random, because I can't seem to find anything personally. I’ve clicked on links for hours sometimes.
I've had a few people look at it, yet no one can seem to find anything.
I need someone who really knows their shit to find this and get rid of it.

Please PM (or email drbizzaro@drbizzaro.com) me with your qualifications and some references and a ballpark idea of a cost.

Thanks,
--Dr B