Hmmm. Long ago I sent examples of the "NULL" issues for Twitter status URL's that I had bookmarked (possibly before favorites were available) as replies to the

Hmmm. Long ago I sent examples of the "NULL" issues for Twitter status URL's that I had bookmarked (possibly before favorites were available) as replies to the Twitter team -- not sure where any of that went but while a database is likely to exist, a guaranteed and representative content store may not be as likely.