This enables you (in a chrome browser) to just quickly type in ta in the address bar, space, then a search term. A google search of those terms comes up, showing only ThinkAtheist pages. 

You don't even have to be on a TA page to run the TA search. E.g. by just typing in "ta fsm warm fuzzy", I get two ThinkAtheist results from google. (By the way, you can bookmark any google search, but I don't even bother.)

To add this search to Chrome:

• Click on the wrench icon, Options, Basic tab, (Search:) Manage button, Add button.
• Type the following into the Add Search Engine form:
• Name: Think Atheist (or whatever you want to call it)
• Keyword: ta (or whatever you'll remember the best) 
• URL: Xhttp://www.google.com/search?aq=f&sourceid=chrome&ie=UTF-8&q=site:thinkatheist.com %s
• [Copy the above url text, without the X in front of it. Sorry, I can't figure out yet how to make that bulleted item just appear as pure text instead of a link in this post. Any html suggestions, please?]
• Click on the OK and Close buttons

That's it!

FYI in any browser, you can still search for TA-only results in google by typing in site:thinkatheist.com, followed by a space and your search terms. (You can even bookmark a blank site search if you want, so all you have to do after clicking on a TA Search bookmark button is enter your search terms into google's search field.)

Click on the following link if you want to see exactly what the TA-only google search will look like before any search terms are added:

• http://www.google.com/search?aq=f&sourceid=chromeie=UTF-8&q...

Other suggestions are welcome here!

(Meanwhile, hopefully Ning will enhance search options. This has already been suggested in TA About, Ideas.)