My reviews have been appearing in online publications for nearly ten years. The list includes Far Sector SF, Deep Outside SF, The SF Site, SciFi.com and its later incarnation, SciFi Wire, and others. Below are links to a few of them.

The SF Site:
Gene Wolfe, Sword and Citadel

The SF Site:
Henry Kuttner, Fury

The SF Site:
Harry Harrison, Bill the Galactic Hero:

The SF Site:
Philip K. Dick, UBIK