Not preggo anymore (whew!) but had twins in December '06. Had singleton in February '05. Twins are supposed to make you SO much sicker, and I had terrible morning sickness with my singleton. I wasn't though, and the bad sickness lasted only about 4 weeks. Very manageable!
Things that really reduced morning sickness for me:
NEVER HAVE AN EMPTY STOMACH - took food to bed with me so I could snack all night!
PROTEIN - natural peanut or almond butter on whole wheat crackers
GINGER GUM - couldn't stand the ginger tea, but the gum really helped
SEABANDS - a little extra pressure when I felt the nausea creeping up
HERBAL TEAS - drank pregnancy tea (nettles are awesome for iron), peppermint helped with nausea as well
We didn't find out we were having twins until I was 21 weeks, so maybe if I had known I would have been sicker.
I had ALL the other symptoms though, so I don't know why I didn't suspect it.
I have heard that hypnosis helps with nausea as well. I did hypnosis for childbirth, but hadn't started it when I had morning sickness. My diet was excellent for the babies, and I think this was why I didn't get sick as badly.
Congrats on all your little buns!