They've averaged about 4 months between previous firmware upgrades. I don't think it's been 4 months since the last one yet, has it?
I'm certainly not particularly bothered about it, joking aside. The promised improvements, such as a folder view and better HTML support, all fall into my "would be nice to have" category rather than "must have". I bought the Gen3 to read MobiPocket books, and it has the best Mobi support of any eInk device, so I'm happy. To me, it's the books that are the most important thing, rather than the "bells and whistles" of the reader, nice though they may be to have.