At last! The Sixth Discipline still might not be free, but at least Shades of Empire is finally for sale in the Sony Reader store!
Sony is the last holdout. Every other retailer (or e-tailer as some like to say) has The Sixth Discipline free except for Sony. The interesting thing is that it's not consistent. Sony had Where Magic Rules up ages ago, but Shades took much longer.
Oh, well! At least there is hope.