From Dave Noon, what Boing Boing describes as a 'Lovecraftian rant' about how much the author hates Blackboard. Brilliant.

If you don't know Blackboard, it is a learning management system from the Blackboard corporation. The company produces very weak products for the educational market but has captured quite a lot of the territory using a business model built on deliberate lock-in (it was able to gain a foothold early on and keeps its position by making it very hard to migrate to a different platform) combined with an 'acquire and eliminate' approach to superior but less-entrenched competitors and, where that fails, aggressive patent trolling.