There are at least two programs out there handling that situation where you just gotta get and view files on your iPhone.
Briefcase (Lite = free & Pro = $4.99) promises to connect, download, view and upload files. Reviews on the AppStore are overwhelmingly positive with most users upgrading to the Pro version shortly after testing out Lite. Briefcase works without installing anything on the Mac side, but is only Mac/Linux compatible. And, it works very very well. Connecting to my MacBook Pro over the wireless took practically no effort (just be sure that you allow remote login SSH connections in System Preferences). Briefcase supports many file types, including iWork, MS Word, .MP3 and PDF. Testing reveals that loading PDF works extremely well and fast, with the iPhone allowing rotation of the screen for landscape viewing.
Offers much of the same as Briefcase. No word from developer regarding .MP3 or video files. In order to transfer files, software must be installed on the host computer. But, on the other hand, FileMagnet offers Windows XP and Vista support. Further, FileMagnet incorporates an intriguing ’tilt to scroll’ documents by using the iPhone’s accelerometer. Because Briefcase fits the bill, and because FileMagnet requires installation of host software, I chose not to test out FileMagnet. FileMagnet has no ‘free’ version and runs a flat $4.99 in the AppStore.
One last note: Either FileMagnet or Briefcase completely eliminate the hack work-around for emailing PDF’s as tipped for loading Flashcards onto your iPhone in this post.