News breaks that eBay is acquiring StumbleUpon for $40ish million, and on the same day Google announces that they are building strikingly similar functionality (i.e. serendipitous website discovery) into their Toolbar. Given the timing, Om Malik says this is Google lashing out at StumbleUpon and eBay because they lost the deal. More scoop at Google Rains On StumbleUpon Parade