Wondering where your HP Slate has been all these weeks since you ordered it? Well, at least one of those precious Windows 7 tablets has taken a little detour from its supposedly enterprise-centric destiny to make a cameo appearance as a dashboard infotainment system. HP, in its inimitable wisdom, has decided to grace the opening of its Vancouver store last month with a customized GMC Yukon Denali truck, which is where we find the company's Slate casually showing off its Acrobat Reader and other big boy OS advantages. We wouldn't really say embed