Screenwriter and blogger extraordinaire John August has released a very handy app for screenwriters (and script readers) called FDX Reader. In my limited experience I've found that the iPad is the perfect form factor for reading scripts in PDF format, but to date it hasn't been able to read industry-standard Final Draft files. FDX reader solves that, and apparently works great with my file-synching utility of choice, Dropbox. Here's a video of the app in action:
With the recent news that Final Draft for the iPad has been delayed until a "later date," FDX Reader fills an important niche for filmmakers who need to read (not write) .fdx files. John is a stickler for fonts, and as a result the app looks very nice. FDX Reader was co-developed by Nima Yousefi and Ryan Nelson, and retails for $7.99 in the app store.
Link: FDX Reader