Lenovo still hasn't officially confirmed it, but all signs are pointing to an imminent US launch of its Android-based IdeaPad K1 tablet. It just hit the FCC under the "K1" moniker earlier this month, and it's now gotten a full blown listing on Buy.com, complete with specs and some pictures that show off Lenovo's "custom-built Android interface." Those specs include a 10.1-inch display, a Tegra 2 processor (not a Snapdragon as we had seen on the LePad), 32GB of storage, dual cameras (5 megapixel rear and 2 megapixel front-facing), a microSD card slot, a micro HDMI out, and even a SIM card slot -- somewhat notably it's also listed as coming with Netflix pre-installed. While most of those specs seem like a safe bet, others apparently aren't quite set in stone, the listing alternatively mentions both Android 3.0 and Android 3.1, for instance, and both a 1280 x 720 and 1280 x 800 resolution (though the latter seems likely). What's more, while Buy.com isn't providing a price just yet, the tablet has also hit Krex Computers of all places, where it's listed at $510.