I've been an SF fan since the golden age of 12, though with long stretches when I read virtually nothing for one reason or another. I own about 700 SF novels.
I have posted a series of reviews to the rec.arts.sf.reviews newsgroup. I haven't been writing many reviews lately as I have read very few SF books in the last year unfortunately. An archive of my reviews is available here:
More as I get time to add them.
I have also written a few SF film reviews
Just Say No to Frames, Ads, Flash, and Animated GIF's