This (via Krugman) will absolutely happen.
House Speaker Nancy Pelosi is open to considering another economic stimulus plan if the current one isn't big enough to turn the economy around, she said Tuesday after top House Democrats met with private-sector economists who said more may need to be done.
"You have to keep the door open to see how this goes," Pelosi said. "But we must give it time to work."
Here's my snap prediction: it'll be smaller than the first recovery bill, but it will contain far fewer tax cuts and more stimulative spending. 85/15 split.