ModMyiPhone is living up to its name. A
haxor developer nicknamed "Cranium" has created a Windows-based File browser that enables users to access and transfer files directly to the iPhone, in mounted fashion, bypassing the sync process.
Unfortunately this is a quick and dirty application created in visual basic express. There is no installer and you'll need .Net libs to make the magic happen. But if you do manage to fill these requirements, you'll be rewarded with a window to your iPhone that allows full drag and drop support, Right-click save as, Auto previews, file backups, etc. The usual fare.
Finally! A reason to use Windows! Nah.