Uncharted: Drake's Fortune demo - please stop now. The demo has been region locked for use on American PS3s only and when played on a PAL machine will show only a message saying "Please insert the game disc". Whether this was done intentionally, we're uncertain. Judging by Sony's previous allowance of demos to be played on any machine (such as Heavenly Sword and Folklore) as well as the region free nature of the machine itself, we're going to assume it was a mistake.
Uncharted is due out on the 19th of November in America, with a European release of December the 7th. As a result SCEE will be waiting for a couple of weeks before releasing the demo to the EU Store, in order to maximise profitability. Until then, we are at the mercy of SCEA who may or may not resolve the "issue" by sneaking up a "fixed" version for eager Europeans to enjoy.
If this is an intentional region-lock, then this doesn't bode well for the future of the PlayStation Store and those of us with dreams of a single, worldwide store sometime in the future will be sorely disappointed.