Boy, we are treading into new territory here. I have a couple of questions before I answer yours tho...
1) When we opt into someones site and as a result recieve a FREE E-Book, is it wrong to likewise use that same E-Book as a FREE give away from our site?
Is the book you received brandable? Does it contain links to something that person is doing? If not, and the book is in the public domain (like Napolean Hill's Think and Grow Rich), then yes, you can freely give it away to build your own list. If the book is copywrited by the person you got it from, and not rebrandable, then no. If the book does have *brandable* links, contact the original site and sign up for the affiliate program or get (sometimes buy, sometimes not) the rebrandable version. That one, you are free to give away.
2) I have some great quotes from some well known people as well as their pictures, is it ok to post them on our site without infringing their rights somehow by using their picture and saying heres what so and so said?
A little harder to answer... are these people in the *public eye*? Are there images of them elsewhere in some type of public forum? It might be best to contact them (if possible) and ask permission. Most, if the post/info is complimentary, won't object. Particularly if you also include a link to get to that person's website somewhere within the *quote*.
Hope this helps.