Unglued is a small set with 38 commons, 22 uncommons, 28 rares, one variation of each standard basic land, and 6 token cards. These numbers are even smaller than a normal small set. The set was printed in the USA.
Unglued was sold in 10 card booster packs. Booster boxes have 48 packs.
Unglued uses sequential collation and 10 × 11 sheets. Packs are back-facing and contain 6 common cards, 2 uncommons, 1 rare, and 1 basic land. The token cards are treated as uncommons for the purposes of collation.
|6 Commons||2 Uncommons||1 Rare||1 Land|
The common and uncommon sheets have been reconstructed thanks to the unboxing data and analysis of Jeremy. (This also provides all the available information about lands.) 
There is a picture of the rare sheet. 
For each rarity, cards are taken from a single long run of length 110.
Lands seem to appear repeating in WUBRG order, and it is probable that this pattern repeats to fill up an entire sheet.
There is a single 10 × 11 common sheet. 22 cards appear three times each (C3) and 11 cards appear four times each (C4). The choice of first card is an informed guess made by Jeremy.
The uncommon sheet contains 26 cards four times (U4) and 2 cards three times (U3). The U3 cards are the Sheep Token and the Squirrel Token. The first card is chosen to align the rarity pattern with the known rare sheet. (Note that the same card sequence repeats four times except for the absence of the U3 cards in the third repetition.)
The rare sheet contains 26 cards four times (R4) and 2 cards three times (R3). The R3 cards are Ashnod's Coupon and Strategy, Schmategy.
 Jeremy recorded an unboxing video and posted the results of analyzing its collation here on the Magic Librarities forum. The common run layout agrees with my previous data (collected from loose packs), and the uncommon data is, to the best of my knowledge, new.
 This thread on the Magic Librarities Forum has a picture of the Unglued rare sheet.