I just bought this theme and it is pretty unbelievable. Like nothing I have seen before. Check out the video on how it works:
YouTube - slideberry vid
And here is the link if you would like to purchase it: SlideBerry
I am not sure what it does to the memory as of yet, as I have just downloaded it. It's a pretty big file (1.1mb) but is pretty neat on how it functions. And yes, I said neat. Just thought I would share...