My favorite gift to give a new homeowner is a Door Knocker with their last name engraved on it. I normally get them at Things Remembered for under $50. Or, if it's near Christmas time, I'll give them a "first Christmas in our home" type-ornament. We have ours, and our friends had a calligrapher print our street address on it very pretty. (just the
123 Main Street part.)
Another one would be a welcome mat - If they're geeky, you can get them one from thinkgeek.com (they have some clever ones "There's no place like 128.0.0.1")
The most useful stuff we got when we bought our house were tools - Stuff we didn't need in an apt, but needed when we had a house. DH had a lot of tools before we got the house, but as a homeowner, you need even MORE. Shovels, rakes, fertilizer spreader, weed wacker, gardening stuff (trowel, pots, weed-takey-out-y thing, spikey thing that breaks up clumps of dirt - as you can see, I'm very garden-y!) Snow shovels, ladders, step stools. Then there's the entertaining stuff - patio set, cornhole boards, swing set/swings for DD. (house had a swingset, we had to get new swings and DH had to make a new ladder for the slide).
MIL was a dream when we moved in... That Christmas, she gave us gardening tools, a better snow shovel, and a gift card to a home improvement store. That gift card was PERFECT!!!!!!! It seemed that first month, all of our extra money was going toward getting something else at the HOpe Depot (closest to our house), Menards (2nd closest), or Lowes (closest to DH's work - he ran over during lunch!). There was always something we needed to get another thing checked off our "to do" list - wanted to clean the gutters, needed a ladder. Wanted to clean out the flower beds, needed spade, shovel (I now know the difference!), and wheelbarrow. Wanted to wash the car - Needed a hose!!!
When neighbors move in on our block/cul-du-sac, I normally bring over some kind of food. Sometimes it's a dinner, but usually, it's a dessert. Last neighbors, I brought a pie. They came down a week later to ask for the recipe.
