I'm not much for reading blogs but here are some podcasts I listen to.  They aren't necessarily about sex work, but about sex topics in general.  You might find some of them interesting.

http://www.sexualdarkage.com/
Ending the sexual dark age (with JV and Shara)
More focused on the BDSM lifestyle but covers a wide range of sex topics in a no-nonsense style.

http://www.lifeontheswingset.com/
Life on the swing set
Focused on the swing/polyamory lifestyle.  Has interesting discussion and topics of thought.

http://nerdist.com/tag/sex-nerd-sandra/
Sex Nerd Sandra
Covers a wide variety of sex topics.  Sandra has a very open and inquisitive mind.

http://www.thewhorecast.com/
The Whorecast
Focused on the sex work industry.  Usually has good discussion around advocacy and education.

http://www.masocast.com/
The Masocast
BDSM and kink focused talk.  

http://www.eroticawakening.com/
The Erotic Awakening with Dan and Dawn
Covers a bunch of topics from sexual spirituality to the dom/sub lifestyle.

http://www.savagelovecast.com/
The Savage Lovecast with Dan Savage.
America's premier sex/relationship advice show.

http://risk-show.com/
Risk!  With Kevin Allison
Love this show.  The tagline is "True tales, boldly told!".  It's just folks sharing crazy, embarrasing or funny sex themed stories.  Great listening - sometimes cringe worthy but often worth a laugh.