Getting files on the iPhone and iPad is some kind of a problem: unless you purchase an additional application in the App Store, there’s no easy way to get any file on iOS by default. Sure, you can email yourself some files and open them in Pages, Numbers - still you have to purchase the iWork apps and only documents can be opened in them. This is why GoodReader for iPad sold so well in the first weeks of April: there was no alternative. If you wanted stuff to land on the iPad, you had to buy GoodReader.
Now we have alternatives. I already reviewed Air Sharing HD, iFiles (the app I use every day) and explained how you can easily link your Mac’s Finder to iOS using a jailbroken iPad. Filer, previously known as Downloader, is a very nice looking and useful file viewer / document manager available both on iPhone and iPad as universal app.