Well first off, 'transgenders' isn't the proper term. It's not a noun, it's an adjective.
Transgender woman or
transgender man.....or however someone in between wants to refer to themselves.
As for blogs, there are a lot out there that are NOT sissy-based. you just have to use the right keywords. transgender, transition, transsexual, etc.
But I would start here:
http://t-central.blogspot.com/ . It's an aggregate of a ton of different trans blogs.