Staples has a sale on these "6 usb drive" cases right now. They're selling for like $6.25 w/ tax. They're great for having a little phone accessories case. I've got my stock dongle adapter, my stock usb wall plug, a retractable cable, a usb car plug, and a short audio cable and an extra battery.
You can use a small exacto knife to remove the seperators in the elastic part of the pouch. this way you can fit your phone accessories in it nicely.
Here are a few pics I took with my diamond.
This shows you how big it is relative to an xbox controller.
This is how the stuff fits in; and how the elastic pocket works once the seperators are removed.
(Thanks below)