This site covers a wide range of language learning and development topic. While not directed specifically at speech pathologists, the info on language training and development in children definitely has applications in speech language pathology.
Language Hat
As of this writing, the author of Language Hat is charging through Russian novels and blogging about the linguistic intricacies they contain. This site is great for readers with linguistic curiosity.
Language Log
This site covers news and events about education, communication, and the media, as well as language usage and articles on the evolution of language written by professors of linguistics at the University of Pennsylvania.
Literacy Beat
This site’s content is a blend of general linguistic info and educational materials for children or anyone who is looking to learn, teach, or share ideas about literacy and language.
The Lousy Linguist
Notes on Linguistics and Cognition is how this site is presented, and it fills the bill nicely. A good blend of short posts recommending resources and longer form writing exploring linguistic topics makes this an easy site to get lost in.
The Mezzofanti Guild
Written by an applied linguistics graduate, this blog has articles about learning new languages and being part of a mutually supportive group of polyglots, as personified by Giuseppe Gasparo Mezzofanti, a prominent self-taught multilinguist.
Teaching Village
Many of the posts on this site are about learning and teaching English, but anyone working on a new language or teaching any language will find a useful classroom tip or study idea at Teaching Village.
Vocabulogic
This blog by a language educator offers technical explanations of how language works, including the terminology that linguists use to describe complex speech and language topics. This site is great for someone seeking a more cerebral take on speech and language blogging.