Lack of Google's official app store has been a thorn in the side of would-be Android tablet makers for a good long while, and it looks like the Tegra 2-powered Advent Vega will be no exception when it hits high street retail tomorrow. Electricpig took the £249 device for a spin, chatting up Advent product manager Adam Lockyer the whole time, and discovered that while the 10-inch tablet will come with the 5,000-app-strong Archos AppsLib store, it won't have Android Market at launch. "The plan is that when you get to January time, there's a new release of Android and you'll be able t