[fivedogit]

Here's my explanation of Google SideWiki... near the bottom.

http://www.words4chrome.com/eli5/

Q: “What happened to it?” A: “It had several problems. (1) sidebars are the worst (2) web site owners hated it, presenting a threat to Google’s core business, and (3) because Chrome had negligible market share in 2009, it had to function in all browsers at once, harming UX. Hence, the sidebar. And the name."

Also, it was open to everyone. Words is designed to select for -- um -- not everyone. Internet explorer users, for instance.

[fiatjaf]

Precisely. I've been trying to remember that name for months.