I've been reading up a lot more on Apache Solr recently and it's applications across platforms and technologies (it's important for me to catch up with the techies at Srijan; I'm responsible for selling the solutions; ahem!), leading up from our Apache Solr + TYPO3 integration recently, and our ideas on the future roadmap. Thought it might be useful to create a repository of interesting material for readers of our blog. Here goes:

• http://people.apache.org/~hossman/apachecon2006us/ : an excellent presentation on advantages of Solr
• http://acquia.com/products-services/acquia-search : Acquia Search - hosted solr service for Drupal sites
• http://code.google.com/p/django-solr-search/ : Google code project for integrating Django with Solr
• http://www.lullabot.com/blog/new-solr-search-module-works :: A dated article on Lullabot by Robert Douglas on Solr + Drupal

If you find more reading resources, please post your comments here - I'll club them together in this post to make a good resource library.