I haven't flown alone with an infant - and not overseas, but I do have some recommendations, just based upon the experience of flying to Houston with my husband and (then) 13 month old daughter.
Good for you for preparing so far in advance!! I also fear becoming the passenger that everyone hates. :)
Here's what I'd recommend:
Someone recommended gogo kidz, which we bought and found to be a tremendous help for getting around the airport - definitely pick one up and use it. It means one less thing to try to carry.
I know it is expensive, but buy your child a seat to be sure that you have one (don't take a chance that you can talk them into giving you an empty seat - there might not be any!). Although not required, the TSA strongly recommends traveling with a child in his/her own seat - in a carseat - for their safety. If the plane encounters any trouble, and you don't have a seat for your child, they ask you to lay the child on the floor in front of you. What could happen is simply horrifying.
If you can book a bulkhead seat, you won't have to worry about people reclining in front of your baby and limiting his space. The carseat takes up a lot of space.
Bring a stroller, but be sure to check it with your larger luggage.
Pack your carry-ons as light as you can. Bring as few carry-ons as possible and bring ONLY the necessities. I cannot emphasize this enough. Remember, you'll have an infant, a carseat (and/or stroller, depending), coats, shoes & tickets/ID to juggle in the security and boarding lines - not to mention your quart bag of liquids (see link below). Include plenty of small toys and snacks to entertain your little one. Roll your changes of clothes (rather than fold) so that they take up less space. Make sure you have some plastic grocery bags to seal up any dirty duds when on the plane - it will just make everyone's life a little more pleasant. Also, a couple of receiving blankets will pack light and come in handy for a bunch of uses: blanket, towel, napkin, cover for an airplane pillow...etc. Because they're flannel & inexpensive, if you have to toss it, you won't feel bad.
Above all, Security: Familiarize yourself with the TSA regulations and come prepared for the security line: http://www.tsa.gov/travelers/airtravel/children/index.shtm
Make sure that the shoes & coats you & your child wear can be removed and replaced very quickly & easily. Make sure your pockets are empty before you get in line. I also found that if you keep all the baby food, formula etc. in the diaper bag & just let security know that all that stuff is in that bag, your experience will be pretty smooth. Make sure the quart bag of liquids is easily accessible to go through the x-ray. Security is not allowed to help you, so make it as easy on yourself as you can.
Good luck and have a safe trip! I hope this helped!
~kat