As I see it, the code that adds social networking links to people in the right side-bar (which is probably the most prominent feature of the bookmarklet) depends on the G+ profile being there.
So Google has their own algorithms to, say, connect Yehuda Katz with a search query for "ruby". This means that the plugin only finds ruby people who also have a G+ profile and then adds links to other services too.
Now for this to be really useful, it should find people even if they don't have a G+ profile and that is what I wonder whether it's even possible by just crawling the web to the extent allowed by the various services.
Adding other Social Networking links to already determined Google+ profiles is not interesting. Finding people on Twitter related to a search term regardless of whether they have a G+ profile or not is the interesting part.
So Google has their own algorithms to, say, connect Yehuda Katz with a search query for "ruby". This means that the plugin only finds ruby people who also have a G+ profile and then adds links to other services too.
Now for this to be really useful, it should find people even if they don't have a G+ profile and that is what I wonder whether it's even possible by just crawling the web to the extent allowed by the various services.
Adding other Social Networking links to already determined Google+ profiles is not interesting. Finding people on Twitter related to a search term regardless of whether they have a G+ profile or not is the interesting part.