The Doggcatcher podcast downloader has the ability to use a directory on your Android device as a socalled "Virtual Feed". Any audio file that you place into the folder will show up in Doggcatcher for you to listen to.
I find this extremely handy when listening to audiobooks. A typical scenario would be that you have downloaded your favorite audiobook to your home PC. Then you connect your Android device via a USB cable. Navigate to your Virtual Feed directory and drop the audio file(s) into the directory. Disconnect, fire up Doggcatcher, open the feed then listen to the audiobook.
This works great but it is kind of a PITA and you must have a USB cable handy.
The Bittorrent Sync Method.
Bittorrent Sync (BTSync) uses Bittorrent technology to allow you to syncronize files in a folder with folders residing on another computer or many other computers, very much like Dropbox except that there is no third party company involved. For a more in depth explanation of how BTSync works visit labs.bittorrent.com/experiments/sync.html
If you make a BTSync folder on your home PC called Audiobook and a BTSync folder on your Android device then all you need to do is drop your audiobook file into the BTSync folder on your PC and it will automatically transfer to the BTSync folder on your Android device.
It's that easy, no wires no PITA.
How to setup BTSync on Android and your PC.
Recently The best Podcast in The Universe started distributing their shows via Bittorrent Sync.
That's all you need to do to setup the BTsync on your PC.