Extended New York Times article on them. The law, as usual, is most favorable to the giants: Google, Microsoft, and especially Apple, which seems to have turned into a giant patent troll. It is no longer possible to start a software company with a good idea; you will will be sued out of existence.
James Kwak of the Baseline Scenario, software entrepreneur and, these days, economist:
Vlingo’s founder since decided to quit the voice recognition field—his area of scientific expertise [of 30 years!]—because of the legal landscape. I would have serious second thoughts about starting another software company today, given what I know about software patents.