Today was a holiday in the US and Canada, but malware authors never take a break. We saw a decent number of campaigns today. One was blogged about earlier here, but the others were the usual tax statements allegedly from the IRS, DHL "delivery problems", and UPS "delivery issues".
So even though it's a holiday, remember the bad guys don't stop working. Make sure you stay vigilant so you and your machine(s) can have a great day off.