Sleep interrupted

Sleep.
Something everyone needs.
Something that tends to elude me at every corner.
First off, having four kids means you get less sleep. I know that. There is always one with... something; sickness, nightmares, thirst, hunger, you name it. But for the last six months I have been woken every 2 hours by a sweet little babe who INSISTS he's starving! Every two hours, which means after feeding him and getting myself back to sleep, I might get an hour or hour and a half. Might.
Well, we moved him to his crib recently because we were waking him up with every move (I'm talking just lifting the blankets). But he hates his crib and hasn't learned that he can fall asleep on his own without my boob in his mouth! And he still wakes up every two hours on average. The other night I went to bed at 10pm, got up at 7am. Between those NINE precious hours, I got roughly 4.5 hrs of sleep that was interrupted exactly 7 times (unless I was dreaming!!). This seems like a nightly occurrence for us. Sadly.
You would think we had experience. Turns out; no. But I do have a lot of excuses and books on the subject. Ha! Oh, sleep. I dream about you constantly. My eyes ache I'm so tired.

UPDATE::
After reading two different parenting/sleep books, I made up my mind and decided to teach Soren a very valuable lesson: How to sleep on his own.
First book, Bringing Home BeBe. This is my new favorite parenting book. Not that I don't already know a little something about parenting, but one thing I have always had is a bit of guilt. Guilt over not being good enough as a mama to my four crazy kids. For some reason this book helped with that. It has some great advice, no matter what country you live in :)
Second book, Healthy Sleep Habits, Healthy Child. At first, this book just confused me, which I think was because my lack of sleep altered state. I couldn't figure out WHAT the plan of action was. Then I read just the section I needed to, and voila, I got it! We have used this method the last two nights, and there is a DRASTIC change in the way the night goes... he goes to bed between 7 and 8pm, (cries minimally) wakes up between 12=1am to nurse, back to sleep until 4 or 5am, nurses and sleeps until 7 or 8am. FANTASTIC!!
Anyways, I am on the mend... our whole house is. Sleep is an amazing thing.