There are lots of workplace giving programs out there. We (TechiesGiveBack - techiesgiveback.org) are looking into a program to bring workplace giving programs to smaller tech companies. IBM, cisco, goldman all have those types of things, often with a commitment to matching, but smaller tech companies who might just be getting HR departments up and running and certainly don't have corporate social responsibility depts seem to be an area that could use some prodding towards allowing their employees to give. Charity navigator has some stuff on workplace giving: http://www.charitynavigator.org/index.cfm?bay=content.view&#.... I think it amounts to a few billion per year ($4.8bn according to this link: http://www.charitynavigator.org/__asset__/_etc_/Guide_To_Wor...).
Might be a self-selecting group of people who respond to this poll. I bet immigrants or recent immigrants are more likely to open the poll because it will be of interest/relevant, skewing the results.
I'm the co-founder of TechiesGiveBack (techiesgiveback.org). We are aimed at helping the NY tech community give back to charity. We've considered different ways for how to approach this problem. I've also been approached or spoken to a variety of different companies looking to make a difference - Crowdrise, IndieGoGo (which we used for a recent fundraising campaign), Let's Give, and others.
We are working on our own new initiative which will allow mature startups and tech companies to let their employees donate a little bit of their paycheck to charity. I'd be happy to talk about that over email...
(We don't take any money for ourselves - we do it pro bono and all work in tech. We raise money for other charities).