Blackmagic has introduced the Intensity, an HDMI I/O card for Macs and PCs. It's a PCI Express device that requires Mac OS X or Windows XP. The two HDMI ports allow video to be transferred at HD quality in 720p or 1080i, or SD quality in NTSC or PAL. Two audio channels allow sound to pass through at the same time. Aside from displaying HDTV, Blu-ray or HD-DVD signals, owners can also do live mixing of two HDV cameras using a pair of Intensity cards and Blackmagic's On-Air 2.0 software. Web and TV broadcasters can send the content to a video deck for broadcast using one of Blackmagic's DeckLink cards. The Intensity should be on sale by the end of the week for $249.