Werner Trotter pointed me to RollYO, a service for running your own selctive search engines. His Edutrain RollYO searches, for example

* grayharriman.com
* mcgeesmusings.net
* ottergroup.com
* downes.ca
* elearnspace.org
* elearning-reviews.org
* clomedia.com
* educause.edu
* elearnmag.org
* researchblog.ecornell.com
* elearnopedia.com
* elearningguild.com
* cetis.ac.uk
* distance-educator.com
* elliottmasie.com
* masie.com
* internettime.com
* elearningpost.com
* parkinslot.blogspot.com
* eduforge.org
* e-learningcentre.co.uk
* flosse.dicole.org
* darcynorman.net
* elearningeuropa.info
* learningcircuits.org

Many of these are sites I track on my SuprGlu aggregator, Jay's Eclectic Tastes. I've put Werner's RollYO link in the right column there.