I'm slightly prouder of the structure of this code than the one in the previous blog post. You can simply inherit from QIFParserBase and override a couple of abstract methods to customize the behavior. Still, I just tested it on a couple of test QIF files. It is not production quality at all.
Notice that I don't even have Quicken. I'm producing these test file with FundManager, which I use for my investments. If your software generates QIF files differently, than you have to modify the code. It shouldn't be too hard.
It works with VS 2008 beta 2.