I want to find good sites that have good articles, forums and other places to interact with other people doing Internet Marketing. Can anyone recommend good sites?

I am building a website and I need good information about internet marketing. Is there any site that offers some good ebooks or articles related to internet marketing?

Im going to be releasing an internet marketing product that teaches real estate investing.
Im trying to find more affiliates, and websites for joint ventures.
Anyone know a good place to find these?
thanks!

I have a small business and a website now i want to market it through Internet. I have read little about SEO and PPC. I spoke to a few companies but they are charging beyond my capacity. Also i am not sure of their service. Can anyone suggest some good SEO consultant or affordable internet marketing company in India ( preferaly kolkata) ?