Getting In Touch With Publishers And Authors

My humble little blog. 

I started it with the hopes of putting some of my thoughts about books "down on paper" so to speak.  The more I learn, the more I love it.

One of the best things about book blogging is being in contact with real live authors about their books.  I mean, these people are like rock stars to me!  And to be in touch with them on a regular basis is like a dream come true!  It's truly incredible.

But I have some questions for you more "seasoned" bloggers.  Was (is) there ever a publisher that you wanted to work with and do reviews for that you had a hard time getting in touch with?  Maybe they said they don't send review copies to bloggers, etc.
How do you overcome that hurdle?  There are a couple of publishers that I would love to do reviews for, but haven't been able to touch base with.  I've sent a couple of e-mails with links to my blog, but never heard back from anyone.  Should I just assume that they are a no-go?

I certainly don't want to look a gift horse in the mouth... I feel so lucky to be doing what I'm doing.  I've "met" so many wonderful authors, bloggers, and publishers that I never in my dreams could have imagined.  I was just wondering if some of you know of specific publishers, etc. that are a little tougher to connect with than others.
Some of them are so easy to deal with, and others... well, not so much.  If I think about it, in the beginning I didn't have a clue as to what I was doing and was really flying by the seat of my pants.  I have a little more experience now and am actually still surprised that when I contact someone about reviewing a book and getting a review copy they say, "yeah, sure!"  I think, "wow!  That was easy!"  So I guess when I ask or send an e-mail and get shot down I'm wondering if I'm doing something wrong.

Any of you ever been in the same boat?  How do you deal with "rejection"?  Do you still pursue it, or do you hang it up with that particular publisher / author or whoever?