LaTeX2HTML makes you write blog like in LaTeX doc. You can just copy and paste to create a new post in WP from your tex source file, then it will looks like amsart
document style. It support a lot of raw latex command including theorem like environment and BibTeX style citation.
Good news, this plugin is free for everyone! Since it’s released under the GPL2, you can use it free of charge on your personal or commercial blog.