I didn't know any other way to present this data as there are 3181 items on sale.
I just whipped it up into a crude table & hosted it here http://myci.ga/r/dse/
I took a snapshot of their prices on 23rd May, and compared it to today & calculated % saving.
Click on the Product IDs, if you find anything useful post it.
Seems to be a lot of ipad / iphone covers.
edit: product names added
edit #2: "Tricky Dicky" - I've updated product prices for 27th (today) and filtered items that have gone UP in price since Saturday.
Top 500 or so discounted items (thanks stratbargain) here