Here’s my scenario:
I have three specific jobs sites:
LAMPJobsLA.com, MobileJobsLA.com, SocialMediaJobsLA.com
I’d like to run them under on “master site”: TechJobsLA.com
but keep the URLs intact when a visitor lands on the page with the posts matching the categories or tags (taxonomy).
For example, if someone visits MobileJobsLA.com, the two URLs that would both work are:
http://techjobsla.com/tag/mobile-ios-android/
or
http://mobilejosbsla.com/ default page redirects to —> http://mobilejosbsla.com/tag/mobile-ios-android
Hope that makes sense.
I see from some of the previous questions/answers, WordPress MU Domain Mapping plugin might work for me.
As long as you’ve created a network first, yes. this is what you need.
Then to pump them all to the main site, use this:
http://wordpress.org/extend/plugins/wordpress-mu-sitewide-tags/
That’s pretty much it.