it's a very expensive mistake to make letting a domain like this lapse. In future, keep the domain and redirect it - a .com can be kept for about £6-7 a year, just redirect it to the new address.
As it's a US address, you'll need to go through
http://www.internic.net/ not nominet, but I don't think you'll get much of a case. In the UK, you might be able to retake ownership, but I'm fairly sure in this case you'll find it very difficult.
I would begin the long laborious process of writing to the review companies informing them of the situation and asking kindly that they change the domain name to the new one. I'd also take the time to explain the situation on the new site, google will index it and it'll slowly start to resolve itself. What you need to do is get above the search engine results.
It may even be worth writing to google on the subject and they may remove the site from listings. Similarly look into web ring of trust etc and review the site on there explaining what has happened clearly stating your case.
This is not copyright infringement, it is trademark infringement. You can retrospectively register your mark as a trademark (the essence of a trademark is something that identifies you in the publics mind) and then get him to cease and desist. If they refuse at that point, you can go down the legal route.
Chances are though he's got a lot of domains he buys up and just redirects them to an existing blog using a mirror system to push more traffic to his site for advertising. I can't view it at work, it's blocked by the proxy.
