A few psycholinguistic sites around the web.

If you're looking for something relatively specific, though, you can't beat Google.

@ York

The Psycholinguistic Research Group @ York is where you've come from (in case you've google'd straight into this page. You'll find details of postgraduates (for US speakers, 'postgraduate' = 'graduate student'), postdoctoral researchers, and faculty.

There's also a large group interested in disorders of language development, with interests in dyslexia, language in children with autism spectrum disorder, and other cases of disordered language development. The group is called the Centre for Reading and Language, and is one of the leading groups working on dyslexia. Aside from their first-class research, they are also extremely good at assessing children and making appropriate recommendations on how to proceed if your child has a language problem.
Specifically Psycholinguistics

This is a Psychology of Language Page of Links. It's quite comprehensive.

Language and Linguistics - glossaries

Xrefer.com is a very useful site for looking up dictionary-style definitions of linguistic (or any other) terms.  There are various 'glossary pages' elsewhere on the web that are more specifically linguistics or psycholinguistics oriented, including SIL International; and these two more computationally-oriented glossaries provided by Parsifal Software and Bill Wilson.
Dictionaries

There are several on-line dictionaries that all do pretty much the same sort of thing.  So if you don't have access to the Oxford English Dictionary on-line, try the following: your dictionary; allwords.com; dict.org; or Merriam-Webster. You might want to look at wordnet also, although it's not really a dictionary as such.

There are various versions of Roget's Thesaurus 'out there', and this rhyming dictionary isn't bad either.

If you'd like to receive 'a word a day' in your email, then you could try wordsmith.org.  They also have a useful anagram solver (to the extent that such a thing can be useful...)

If you are interested in etymology, eleaston.com has some excellent links to online etymology sites (as well as to word-a-day sites and various others). 

Grammars

This is a really useful site with links to pages that describe/teach the grammars of (some of) the world's languages, but you have to wade through a ton of advertising and other stuff before you get to the meat of the page. But it's worth it.
Psycholinguistic Journals

These links to psycholinguistic journals are fairly good, but there are several journals that contain articles with psycholinguistic content but which are not language-specific and which do not, therefore, appear here (such as Journal of Experimental Psychology, to pick one example). GA is about to become the Editor-in-Chief of Cognition, and that also is missing from the list (the fact that JEP and Cognition are missing is just a reflection of how the search terms are applied.

Latin

Lipsum.com will generate any amount of "Lorem ipsum dolor sit amet, etc. etc". GA uses it for writing grant proposals. Could explain why he gets funding...

Onions

You can't beat The Onion for current affairs, or even affairs of a different kind...