Phishers now pretending to be the IRS...
Here's hoping the powers that be will get serious now that the IRS is being impersonated.... the bad guys are getting overconfident if they feel safe impersonating Government departments like the Department of the Treasury - screenshot at link below:
http://www.websensesecuritylabs.com/alerts/alert.php?AlertID=372
Castlecops also have a writeup (no screenshot):
http://castlecops.com/a6537-IRS_Phish.html
This isn't a new phish - you'll note the Websense alert is dated December - its a resurgence ;)