Resolved
Websolr service should now be restored.
Apps using Websolr will need to reindex. If you are using Acts As Solr, run "heroku rake solr:reindex". For SunSpot, run "heroku rake sunspot:solr:reindex".
Issue
Websolr is currently down for maintenance, following an unexpected crash of several EC2 instances. All apps using Websolr are currently affected. The Onemorecloud team is working to restore service, and a resolution is expected within 1 hour.