So much incorrect information, instead of correcting everyone, I'll just re-answer your question.
A HUD home MAY be eligible for their $100 down incentive IF the Home Ownership Center for the area is currently offering it and IF the borrower makes a full price offer, otherwise standard down payments apply. Since I just did one of these deals (as a 203k/rehab loan even), I know they are still doing it currently.
As John stated, your area disqualifies you for that incentive (I didn't verify but since he's a public servant also, I'm assuming he's correct) but you may still strike gold with a HUD home. John or another agent local to where you're looking would help you make an offer on a HUD home of your choice and would be the ONLY agent involved in the transaction as they're interfacing directly with the asset management company on HUD's behalf.
) has numerous programs that may benefit you (though there's no guarantee that any one program has money at any given time, we can determine that at the appropriate time). Programs range from second mortgage (down payment assistance) grants of up to $6000, rehabilitation silent second mortgages (forgiveable) and monthly tax benefits, it just depends what makes the most sense for you and your budget and of course what you qualify for.
If you'd like to sit down and go over the finer details of the program and even the 203k rehab loan (which can be used in conjunction with the $100 down option to remodel/update or more drastic work if you choose) or IHDA program, contact me via my website or my profile. I'm available as early as Friday for appointments this week (or phone works as well).
I'm also a published writer on renovation financing.
My contact information is in my profile and on my website.