Wamu takes a dive: that’s NYSE:WM
Wachovia takes a dive: that’s NYSE:WB

Other NYSE:W* to watch
NYSE:WF Woori Finance (off 20% today)
NYSE:WG Willbros Group (Off 16%)
NYSE:WL Wilmington trust (Off 14%)

But honestly.. following the basic pattern the next victim of collapse would be:
NYSE:VQ Venoco, Inc (Oil and energy company off 8% today to $12)
Though if we simply look at Investment/Banking between VQ abd WB we find:

NYSE:VT Vanguard Total World (Off 7.5%)
NYSE:VV Vanguarg Large Cap (Off 4%)

Have fun 🙂