BETA PRESEFY is a snappy web-based service that allows you to upload PowerPoint and PDF files to the cloud and broadcast them over a secure channel using a mobile device. The startup, freshly incubated out of the Startup Sauna at Finland's Aalto University, is poised to disrupt USB clickers which start around $40. The Presefy free plan allows for any two presentations at a given time with the only caveat being that a WiFi connection is required to control or view the presentations via mobile. A Pro plan is in the works which would allow for up to 20 presentations on a password-protected channel, and the ability for users to comment, annotate, and download presentation files.