Ok, so I'm looking to buy a Kryptonite Fahgettaboutit U-lock, but I have no idea if it's better to get the mini or the standard size. I know that the Sheldon method calls for a mini, but is there any advantage to having a regular sized u-lock? Different locking methods, perhaps?

Also, is it possible to lock around the rear wheel and the frame with a mini u-lock? I know it's not necessary, but it would make a better mental deterrent (for thieves who "don't get" Sheldon's method), I feel.

An alternative to using Sheldon's method with similar effect is to lock through the spokes and the chainstay closest to whatever you're locking to.

Ok, and I assume this can be done with a mini u-lock? I.e. the smaller the lock (that still fits) is better, right? Less leverage for the thief and all that jazz.

Mini would be a tight fit to get wheel and frame, it would depend on the wheel-frame spacing, as well as the diameter of whatever you're locking to. Don't expect it to work every time.

That said, I prefer a mini because I can put it in the back pocket of a pair of jeans.

I use a mini U-lock as a second lock. A standard U-lock or chain locks the bike and one wheel to an object, and the mini locks the other wheel to the bike frame. There aren't many things around here that could accommodate a mini lock plus a bike.

If you can fit the mini around the rim and a post, you can fit the mini through the spokes, around a chainstay and around the post (you can't lock the bike any closer than the chainstay will allow anyway).

I use both. Sometimes, with the mini, I just can't find anything reasonable to lock it up to. If I am going to a place that I know I can use the mini, I bring it. If I am unsure, I take the standard size lock.

The mini is... mini you need to work harder to find someplace to lock it up. It is a bit safer though since leverage attacks are harder.