I wanted to post this here, since this is more of my sounding board for the Drupal community, but the details are on my personal blog: starting October 6, I will
For some time, Solr 3.x and Drupal 7 have been able to do geospatial search (using the location module, geofield, or other modules that stored latitude and longitude coordinates in Drupal that could be indexed by Apache Solr).
I'm still recovering from an intense week of Drupal here in Austin, TX. I kicked things off by walking around the downtown area, then taking the intensive Acquia Drupal Developer Certification exam.