Rumors are swirling that 3D desktop interface Canadian startup BumpTop has been acquired by Google. We started getting tips yesterday pointing to a now-deleted Tweet from a Canadian VC saying Google had acquired them. When I called CEO Anand Agarawala on Friday to ask if BumpTop was acquired, he responded, “Not that I know of.” But today, there is a notice on BumpTop’s homepage saying that it will discontinue its current products and has a big announcement coming: