Not a lawyer, but I wouldn't worry about it.
a) software patents are pretty useless nowadays, it takes so long to get it, that by the time you have it, your patentable technology is a $39.99 script people can buy.
b) Its not your problem to adhere to all issued patents, until someone starts suing you. I mean look at ANY site on the web, they are probably in violation of 200 patents. Chances are the "Add Comment" button has already been patented. So has the hyperlink I used to view your story. So has the term "flag"
c) Most of these "patents" are bullshit.
d) There is no guarantee that these guys will even get their patent approved.
e) You don't even know what they are trying to patent. For all you know, their patent has nothing to do with their technology, it could just be a patent for something stupid like "a way to display a hyperlink in a lime green bold times new roman font".
So personally I'd just go ahead and do whatever it is you want to do, because chances are there is prior art that you can cite to make anything they come up with invalid.