It's a strange irony that Google, the driving force behind the invention of SEO, often fail to bother with it themselves, even on extremely high-profile products.
As noted, Google Profiles have meaningless, unguessable URLs: https://plus.google.com/112349855959838705650
Items in the Chrome app store are similarly opaque: https://chrome.google.com/webstore/detail/aidgmjkfmbhldhnhko... (As are all Chrome extensions:) https://chrome.google.com/webstore/detail/ddngkjbldiejbheifc...
YouTube videos have no title information at all: http://www.youtube.com/watch?v=cfQhfYA2cH8
Orkut (a low blow I realize): http://www.orkut.com/Main#Profile?uid=16458042622225437726
News topics: http://news.google.com/news/more?pz=1&cf=all&ned=us&...
It confuses me.