This Google hack is intended to help find blogs that you can comment on that have .edu TLDs (aka domain extensions).
For a basic search, just click on the .edu Finder Hack link in the left column. This will bring up a number of generic results.
You'll see the Google search box contains:
site:.edu inurl:blog "post a comment" -"comments closed" -"you must be logged in"
Let's break this down:
1 The first part of the search is looking for sites using the .edu TLD.
2 "post a comment" is looking for sites that allow us to, yep, post a comment.
3 -"comments closed" Note the - sign (minus sign) This eliminates pages that have closed the comments
4 -"you must be logged on" Again, uses a minus sign. We're trying to find pages you don't have to log on, in order to post a comment.
If you want to target your results for relevance, just add your main keywords after the text in the box and search again:
site:.edu inurl:blog "post a comment" -"comments closed" -"you must be logged in" dog training
Also, you can try to find .edu sites with many other searches. Just add the
following to the search box:
site:.edu
For example, if you are searching for "graphics forums", you may want to try to search for:
graphics forum site:.edu
(Don't forget the . before edu)
Note: I tried this hack with .gov sites, and there weren't enough results to justify adding it here. But you can try changing .edu with.gov if you want to see for yourself.