Is their an app that you can get to access you home PC thru it's wifi and open and use pdf documents and other items that are on your PC
If you just need access to files on your PC then most file managers (Astro, Estrongs, etc) will do the job.
If you want to remote to the PC then that's entirely different.
look at homepipe online and there is an app in the market.
Just downloaded it and was listening to music on my computer and was able to view pictures on it also.
You have to have the files in a folder in the document library on your computer ( I am using a windows 7 pc)
they have a limit use for free, think it is 10 times a month or a yearly fee.