In it, but not of it. TPM DC
Joined at different times by Sen. Sherrod Brown (D-OH) and Sen. Mary Landrieu (D-LA), Sanders has been decrying the Obama tax cut plan for bailing out the wealthiest people in America. "How can I get by on one house?" Sanders railed, sarcastically. "I need five houses, ten houses. I need three jet planes to take me all over the world! Sorry, American people. We've got the money, we've got the power."
As a result of his efforts, he's shot up to near the top Twitter trending topic chart. Filibusters like these were much more common decades ago, before the rules changed and Senators could really run out the clock by holding the floor and talking and talking without pause. Things are different today -- and, whatever Sanders does, the Senate isn't scheduled to hold any votes until Monday, so its practical effects may not amount to much.
If you've got the time, C-SPAN's got the video of Sanders' entire eight-plus hour marathon speech right here.