There are seemingly millions of cool audio gadgets available now, but it's nearly impossible to find reviews of sound quality that say more than "it sounds real good!" (poor grammar intentional)
Outside of Sound & Vision Magazine columnist Ken Pohlman, the only other mainstream reviewer who does true in-depth reviews of sound quality is PC Magazine columnist Bill Machrone.
Bill just launched a new blog called Serious Personal Audio, where he writes detailed reviews and analysis of digital audio players and headphones. Excellent stuff so far; he even reviewed my favorite headphones and ear buds!