I think the subject reviews are an invaluable resource. I'm not sure they need to be moved anywhere and they already have a fair amount of Google-juice, but I'm sure there are plenty of places it would be worth mentioning or linking to the reviews here. A mention in a Student Union magazine might also encourage a bit more diversity in the subjects being reviewed, which are pretty heavily weighted towards to science and engineering at the moment.
Anonymity on forums is another kettle of worms entirely. If you don't put a lot of effort into hiding your identity, sooner or later people will be able to figure out who you are. Especially if you're reviewing 3rd year or postgraduate subjects and posting the percentages you got in your subjects. I've got a pretty identifying username, but even if I didn't, postgrad maths students are a pretty small cohort and even the list of subjects I've reviewed would be enough to uniquely identify me. Is that enough to have a chilling effect on what I write? I don't know, because I haven't taken a subject that deserves a really scathing review yet, and obviously I wouldn't write anything abusive.
I haven't heard the simpak saga, though...