Hehehehe... I actually did find the Ray Charles SACD in with the DVD-As at Tower Records, along with the Henry Mancini SACD. Same thing at Best Buy. The Flaming Lips DVD-A seems to end up everywhere from the DVD-A section at Tower, to the SACD OR regular CD section at Best Buy, and once even the DVD-Video section (can't remember the retailer).
Anyway, I have to agree with Rachel on the short super jewel cases being my preference: you can tell it's not your normal CD at a quick glance but it's still the same size, plus they are usually labeled on all four sides, instead of two like on standard CD cases. I like Digipacks too, but the multi disc ones (especially Elton John's Goodbye Yellow Brick Road w/ bonus DVD and the Who's Tommy) can get to be a bit of a chore if you don't have a table or something to unfold it on (too much gear in my home theater!).
At least the Alien Quadrilogy box set was so big there was no temptation to try!
Justin