how many did 1.1 add
about 500 i think
but it really isn't that much if you think about it logically.
pretty much all new ores, to begin with, will have multiple items: normal ore, ore background, brick, brick background, bars(most of the time), three armor pieces, multiple weapons, sometimes even accessories
so if you count that for 10 new ores you pretty much already have like 120 new items, and that's just the ores + equipment
then you also have the new biome wood and a bunch of other items