If there's still not enough change in your couch to snatch up a $399.99 16GB HP Touchpad , today could be your lucky day -- that is, if you're in the market for a webOS slate in the first place. It looks like Staples is offering a $100 coupon for the slab, which should be applicable to the already discounted price, giving you webOS love for $299 for the 16GB model and $399.99 for 32GB. If that price gets any lower, the $35 tablet might just have to step up its game.