SUF  Just a note, this product does not and doesn't seem likely to be supported on Snow Leopard. May I suggest Glims as a direct replacement with broader features and no affiliate links. :)  
(Version 3.2v62)

IAMSE7EN  THE HYPOCRISY OF DAVE WATANABE [this developer]:

Watanabe likes to say this when asked about updating Inquisitor: "Any decisions about the product are Yahoo!'s to make. It stopped being my product the day it was sold."

The day it was sold?

Let's see, this is what you wrote on your blog, the day it was sold:

"I look forward to assisting Yahoo! in refining and extending the Inquisitor user experience beyond where it is today. I truly believe that Inquisitor and its users can only benefit, both from Yahoo’s resources and attention, and from the product integration possibilities that would have been impossible to pursue on my own.

It’s important to note that while I will continue to be the lead developer behind Inquisitor for Safari, I will not be joining Yahoo! as an employee. I have every desire and intention to remain an independent developer for the Mac, meaning that Inquisitor,Xtorrent, Acquisition, and NewsFire will all continue to be equal priorities in my life."

What?! Assist Yahoo! in refining and extending the Inquisitor user experience? Users will benefit? You're the still lead developer? Inquisitor still be an equal priority along with your other products?

HYPOCRITE.  
(Version 3.2v62)

CUNEYT  This really is pain in the youknowwhat.. Been waiting so long for an update, I was really happy when I saw it downloaded it, and STILL DONT WORK.. what the hell.. Am I the only one or what.. Am I using Mac OS from another planet.. I know its free software but dude your letting us down.. BTW I am using Tiger 10.4.11 (which is supported) with Safari 4.03  
(Version 3.2v62)

TWISTED  Inquisitor improved my way of searching on the Internet! I really love it and it ease of use and config. Too bad that is not working well with Safari 4.0.3. Just hope the developer will do something soon!  
(Version 3.2v61)

LIBCRYPT  The latest version of Safari (4.0.3 here) pops up its own search suggestions on top of Inquisitor's. Anyone know how to turn off Safari's suggestions?  
(Version 3.2v61)

PEDRO FARDILHA  Hi All.

Inquisitor was sold to Yahoo, probably that's why the original dev no longer supports or even answer emails.

If you go to Inquisitor web site and click to read the terms of service (EULA) this is the link yo get:

http://info.yahoo.com/legal/us/yahoo/inquisitor/inquisitor-3961.html  
(Version 3.2v61)

CUNEYT  When is this thang going to be updated dude.. What happened, did this guy past away or what? Its been months Safari 4 is out..  
(Version 3.2v61)

PATRIZIAF  The search function (Safari 3.2.3) works only with Yahoo... not with Google. With Google you receive only the suggestions (lens).  
(Version 3.2v61)

THUS.SPAKE.Z  While Inquisitor appears to have been installed in my Safari 4, its icon does appear in Safari's toolbar and Inquisitor's configuration panel is launched when clicking on the icon, its search function doesn't seem to work. I've also got Glims installed but don't know if there's a conflict between it and Inquisitor.

unfortunately, emailed queries to the developer go unanswered. Support seems unavailable. For that reason, the developer will not be getting any financial support from me if any kind of financial support is requested.  
(Version 3.2v61)

F451  Works well for me on Safari 4 beta, Leopard, Intel.  
(Version 3.2v61)