There is this awesome app called FileMagnet, which lets you upload files from your mac to your iPhone as a storage device through wifi. It lets you put any type of file and then if you need to you can view those files right on your phone! You can upload huge files like your pdf and view them on your iPhone.
App costs $4.99, but definitley worth it, make sure you have a wifi connection and a mac computer.
Which iPhone are you guys using? My 3G iPhone and v1 iPhone continue to open PDF's in my emails, and I've been doing it for quite awhile. I send the PDF as an email attachment on my MBP and Mac Pro 3.0 without a glitch. You don't need no "stinkin" app for that procedure... LOL 😱
the OP has a 30MB PDF file in which he was unable to send to view in mail because of the size. Hence he was asking for other alternatives.
folks sorry to bust in here, but to you filemagnet users, why in the world has no one developed the equivalent for windows? I'd gladly pay $5.99 or whatever for that app. Seems that there at least be as a big market for that app as filemagnet/mac.