We just had a feeling that HP wasn't going to be able to keep quiet about the Slate while the iPad hogged the limelight this weekend, and like clockwork it's released another rendered teaser video of its Windows 7-based tablet. Unfortunately, the clip reveals nothing about pricing or availability (though we have heard rumors of June), but there are some exciting quick demos of the Slate's cam and video conferencing skills. Take that, iPad! We actually happen to be most interested in the brief glimpse you get at the touch UI -- the icon-based interface looks similar to past Tou
