It'll be really hard to sort the reviews if a lot of them get posted with the blog format. It archives by month, and I'm not sure if you can set blogger up with categories like type of part, brand, etc.
Might be time to break out an HTML and CSS, PHP, Javacsript, etc. book if you're serious about making a good review site. You'll have to decide if you want the reviews to be long articles, or just little personal anecdotes that people can write. Look at dpreview.com for an example of the long articles, or newegg.com's reviews of their products for the short summaries.
Good luck with it... I can maybe write a review of the Jim C's or something if you want, in a day or two, or the Animal ASM or Edwin grips.