I was confused myself while performing the first oil change on my 2011 696. The oil drain plug is the one opposite the plug under the screen cover. The correct allen size is 5mm. Being concerned about stripping the drain plug, I replaced mine with an aftermarket 12Mx1.5 standard magnetic drain plug (one which takes a wrench vice the allen head). You can find them at almost any motorcycle dealership (I picked mine up at a Honda dealership for $8.95). In my humble opinion, it is far to easy to strip the stock plug owing to not having the allen head fully inserted.
If you visit the Ducati website, you can find a link to the illustrated parts list which should help with future maintenance. I also downloaded the 2009 workshop manual and while there are differences between the 2011 and 2009 models, the torque values are the same as well as many of the other internals.
Kudos for performing your own oil change, don't forget the oil screen cover and screen itself accept a 14mm allen head, which can be found at a "Northern Tool" store or similar. If you go to the Ducati dealership, be careful, I was given the wrong drain plug washer for my bike on the first oil change. The washer should be copper and is smaller than the ones used on previous models (which are aluminum I might add). If you purchase the standard plug style, you will likely use an aluminum version and I picked up 5 or 6 when I purchased mine.
On another note, if you would like to use a more standard oil filter, PM me and I can provide info on an adapter which would allow you to use a more commonly available type (no, I don't sell it nor am I promoting it).
While oil and oil filter selection appear to approach a religious debate on the forums, I use Rotella T6 5w-40 (synthetic oil) and a Fram XG3614 oil filter (with the adapter) on my bike without trouble. The stock filter was originally designed for a Citroen (French automobile) among several other European automotive applications...
Hope this helps..
Last edited by elgallo73; 06-23-2011 at 12:00 PM.