Part experimental, part disruption, and part heads-up in this week’s edition of DLTJ Thursday Threads. The first story is a proof-of-concept demonstration of a way to browse an “infinite” bookshelf of virtual items. Next is the announcement of how a content producer (Pearson) is trying to disrupt a deeply embedded technology company (Blackboard) by giving away a learning management system in the cloud. Last, a list of what researchers think will be the most prevalent computer security problems next year.