Twitter today announced that it will soon roll out a new version of search that includes photo and video results. "Relevance" is the focus, rather than chronological order. The announcement came at the "All Things D" conference, and Joshua Topolsky had an interesting followup question:
Just asked @dickc about why Twitter won't let me get at older tweets.
Costolo's reply, as paraphrased by Joshua [on Twitter]:
Basically? The infrastructure isn't there.
Danny Sullivan of Search Engine Land addressed this shortcoming back in 2010, with a pointer to third-party services that can help: basically, Topsy is it. Or, I suppose, you could always ask the Library of Congress!