Actually, Google has a built in way to do this. On the left sidebar after you perform a search, you will see "Images, Videos, News, Shopping, etc." click on More, then on either Blogs or Discussions.

This will bring up what you're looking for. You can also do a search for "Powered By Vbulletin" or "Powered By PHPBB" coupled with your keyword to find relevant forums on the niche.

Hope this helped!

That's good info,

I just created our marketing/ad forum last month. It's been great, but I do get a lot of Russian Spam:

www.rentmyadspace.com/forums

here are god tips that will aide you in locating forums of your choice or your niche
1. Big-boards.com it is a data base popular of forums

2. using google search box use like this
Type your main keyword or topic idea and then put this:
"powered by vBulletin" (in brackets) because vBulletin is the most popular forum software.
You can also use other kinds of software references to find some more ideas:
“powered by BlogEngine”
"powered by yabb"
"powered By MyBB"
"powered by ip.board"
"powered by phpbb"
"powered by phpbb3"

FOR BLOGS
just as you did in locating forums use this for footprint below with the keyword before the footprints list below
“powered by Wordpress” to sort out other sites.
You can also use:
“powered by joomla”
“powered by drupal”
“powered by modx”
“powered by typo3”
"powered by eZ Publish"
“powered by mambo”

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To find for blogs
“Powered by ........” %KeyWord%

To find forums
"KeyWord"forum

You can also setup Google Alerts so you can stay up to date on relevant blogs or get the latest new posts in your niche so you can build backlinks or generate traffic. Just go to Google and type alerts and it will be the first result. You can set it up to email you daily or even as it happens.

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Use google search to get what you want and you can still take a try of the google alerts, related blog will be send to your email.

Try any top level directory like Dmoz, alltop. Go to the appropriate category of your blog. You will find many top notch blogs there. The next step for you would be to find which one of them are dofollow forums.

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How To Find Relevant Forums
KEYWORDS “powered by phpbb” inurl:/forum
KEYWORDS “powered by vbulletin” inurl:/forum
KEYWORDS “powered by smf” site: /forum

KEYWORDS “powered by phpbb” inurl:/community
KEYWORDS “powered by vbulletin” inurl:/community
KEYWORDS “powered by smf” inurl:/community

How To Find Relevant .Edu Forums
“powered by vbulletin” site:.edu
“powered by phpbb” site:.edu
“powered by smf” site:.edu

RELEVANT blogs that allow comments

KEYWORDS “powered by wordpress”
KEYWORDS “leave a comment”
KEYWORDS “reply to post”
KEYWORDS “leave comment”

RELEVANT blogs that allow comments with keywords as anchor text

KEYWORDS “this site uses keywordluv”
KEYWORDS “this site uses commentluv”

How To Find .Edu Sites That Allow Comments
KEYWORDS “powered by wordpress” site:.edu
KEYWORDS “leave a comment” site:.edu
KEYWORDS “reply to post” site:.edu

Hi,
Find by using Keywords: related forums
2. “powered by vbulletin” site:.edu
3.KEYWORDS “powered by phpbb” inurl:/community
4. In forums there will be one search option, if we are puting keywords or related subject we will get related posts.

If you want to search out related forums you should go in Google searches and then go in Blog there you should search out the keywords you want to get blogs about. You will find fresh indexed, relevant and authority blogs.

Just use the drop-down options in Google search. (Discussions, blogs, etc.)

You can also narrow down the results by date by choosing 24 hours, 7 days, 30 days, etc.

I wrote an articles about this Where To Go To Find New Members For Your Subscription Site...For Free - MembershipExpert.com

The best source is the big boards list.

Typing the below mentioned option in the search :

"Powered By Vbulletin" followed by keyword

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