After reading the article, I'n not very concerned. A couple of points come to mind.
First - this seems to be a habit with the plaintiff. Tried a similar suit 10 years ago against American Airlines with respect to automated travel reservations. After losing the case in district court, and having the appeal denied, two of the three patents were then invalidated. To me, this shows that this person is using patents for greed.
This time around, he's going after smaller companies. Companies that are more likely to settle than fight. He talks about possibly going after the big players, but they have the resources to fight back. That, IMHO, is why he's leaving them alone.
The good thing is that a number of small companies have combined their resources to fight back. I do believe they will win, and this shall pass.
Its certainly worth keeping an eye on, but I'm not going to lose any sleep over it. Good Luck
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As a circle of light increases so does the circumference of darkness around it. - Albert Einstein