Wormholes

Hello!

I know nothing about wormholes. I'd like to know more.

To make things clear the only thing I read was ages ago about Aperture Harmonics using some shady (or creative) tactics against Rooks and Kings I think it was... Since then I've not paid any attention to who's who or any of the normal drama.

So any chance anyone can give a list of the main corps / alliances and their notable traits?
What are the average expectations for joining one of these corps?
Aren't wormholes (or at least their products) becoming a bit worthless?
- I mean I see T3 hulls are at an all time low in price and still dropping - how does the economy work in there if noone really wants the products?

Thanks in advance for any helpful posts.

thanks