UPDATE: I took out 2 that are no longer working and used the advanced search to find 9 new sites that allow you to create .EDU blogs.
Here are 11 different sites where you can create your own .EDU blog. You can post an article and put one or more backlinks in it by editing the html code. It's very easy to do by clicking on the +/plus button near the top of the main page to create a new page.
http://disted.midmich.edu/groups/wag/
http://hopper.macalester.edu/groups/paralleledudev/
http://biology.nebrwesleyan.edu/groups/cindymarolf/
http://cehsp01.d.umn.edu/groups/mary/
http://qt1.bentley.edu/groups/goldendelicious/
http://itunesu.wasatch.edu/groups/ome/
https://iwiki.uco.edu/groups/oit/
http://agnew118.ext.vt.edu/groups/calendar/
http://discovery.unl.edu/groups/mert/
https://iwiki.uco.edu/groups/leadership2010/
https://podcast.carleton.edu/groups/devsposcresources/
Also, here is the advanced search term to potentially find more in Google...
site:.edu inurl:groups "wiki"