Note that "notable" doesn't mean "not seen before" - botcoining is hardly new.
There is an interview with a malware writer, from at least a year ago (somewhere on reddit), where he confessed that he made most of his income from botcoining. It was that interview that made me realize that doing it with my own hardware and electricity would probably be futile, not really any different than paying cash for them, and sent me on a search to find out if there was a more ethical way to get others to mine for me.
BTW, if anybody gets the bright idea I had and considers using Bitcoin Plus, forget it. You won't make anything
. If you put their script on your site it will be flagged by google as a harmful site. If you link to your miner page it won't, but any BTC that gets mined for you, you'll never get. You can't cash out and the site owner doesn't answer emails. Seems like a big scam to get lots more people to mine BTC for the site owner, by making them think he will actually let them have what's theirs.