I love running OSX 10.5 on my macbook, the most stable OS/hardware platform I've ever used.  But it pissed me off to not be able to access the filesystem of my non-jailbreak iphone.  Luckily, it's only two short steps away now.

+macfuse

...both of which, when used together, bring me diskaccess to the filesystem on my standard Mac-formatted iphone.  Keep up the good work, people.