We had hoped that the Linux-based open-source Spark tablet would be up for pre-order already, but the logistics gods have decreed it not to be. Order registrations are now simply said to go online "ASAP". In the meantime, the developers hope to whet your appetite with this video of the 7-inch budget-slab in action. So it looks a little bit laggy right now, but the team behind it says there's plenty of performance to be squeezed out of it yet. Likewise the UI you see above is optimized for a larger screen, meaning thumbnails and margins should be sharper once those kinks have been ironed out. Hit the source below to get the full update on the pre-order setbacks.