This was the first time that I read an article with a very positive view of immigrant workers in the US:
http://www.businessweek.com/technology/content/feb2009/tc2009029_333899.htm
Quotes:
Tech companies were highly dependent on Indians and Chinese for their innovation.
In 2006, these groups contributed to 33% of patents filed by Intel (INTC),
23% of those for Microsoft (MSFT), and 22% of patents filed by IBM (IBM).
Even for consumer giant Procter & Gamble (PG), the immigrant patent contribution was 11%.
More than half of Silicon Valley startups were founded by immigrants over the last decade.
These immigrant-founded tech companies employed 450,000 workers and had sales
of $52 billion in 2005.
...with the World Intellectual Property Organization of Geneva. We determined that foreign nationals
residing in the U.S. were named as inventors in 25.6% of international patent applications
filed from the U.S. in 2006.