The Blade of Aihonen is a quest item, you need to solve the quest in the prologue with the blue-skinned woman (Sirene?) in the bottom left of the map...won't ruin it for ya, but you'll get the blade at the end of the game, when you return to Easthaven. And potions the permanently raise are in the game, but tomes don't seem to be. Most of the pots simply swap points around, but there are some who'll give you a free stat point.
For the other things, I'd expect many of them will be in the expansion.
-Wrath
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