For every post that you see complaining about something not working, there are probably lots and lots of people who never have any problems. The people most likely to post online are the ones that have a problem. Because of that, you see a much higher percentage of issues than exist in reality.
I wouldn't worry about it, unless you find that something doesn't seem right. Chances are that your iLiad will be fine.
If it makes you feel better, mine has not had any trouble with any of the Mobipocket or PDF files I've read on it. Networking works fine, and I can read/write to an SD/MMC card without any trouble.
