The iPhone's virtual keyboard has quite a few tricks up its sleeve, but one thing it can't do is type a grave accent mark without a letter (a ` or backtick to all you programmers out there). So while 99% of you probably don't care, it can be a problem for those who need to enter the backtick for a Wi-Fi password.
Thankfully, there is a way to get around non-typable passwords using the iPhone Configuration Utility.
