You don't see wands of haste in the treasure tables because there are concrete defined rules for what spells can be put into wand, potion, and scroll form and to make random magic item treasure tables to include every possible spell in each type of item (especially at different power levels for some like scorching ray) would take up quite a bit of space.
I think WOTC should post revised random treasure tables that include items from all the other books like the complete series and have a comprehensive list of valid wands, potions, etc...
I like alot of the items introduced in other books, but I would like to be able to ramdomly determine if said item is available for purchase or to ramdomly generate it in a treasure.