I did a search for all tags starting with "google":
[google*]
And it returned this url:
This doesn't include the google-presentations tag which currently has 12 questions.
Is there a limit to the number of tags that a wildcard tag search will match?
A while back there was some issue with the wildcard expansion generating excessively long URLs that would be rejected by the web server. Jeff imposed an expansion limit as a workaround, which seems to limit the wildcard matches to the top 20 most popular applicable tags.
http://example.com/tagged/foo+bar+bazhave a "path length limit" of about ~260 characters