Tim, you should have an initial email that goes out to new subscribers that include a link to the review area. Or perhaps a follow-up email after a month that tells your customers about the DSLReports Review page?

If you are gaining thousands of sign-ups, I would think that would generate at least hundreds of reviews.

I do my part by keeping a link to my DSLR review in my DSLR signature. I also just updated USA2K.com with a mention of VOIPo.com (And a link to my DSLR review.)