Thanks for everyone's suggestion on Naperville spots (and the replies for my 11th hour request for brunch spots!), here's my sort of report:
First, my trip was a family visit thing, so I didn't really have a chance to take advantage of most of the suggestions people here offered. My hosts weren't too impress with Fab Noodles, so I didn't press on that. Most of the time, it was cook at home dinners (fun, big, and delicious).
These are the eat out highlights:
Chinn's 34th St Fishery, 3011 Ogden Ave, Lisle, 60532 - (630) 637-1777
I went here last time I visited the Ill relations, and it's a really good fish place, nothing fancy, but solid and fresh. This time (for lunch) I had the crab au gratin, which I have to say was a mistake. It was okay, just not as good as the blacken fish I had last time. The fried shrimps my niece had was pretty good too. Otherwise, stick with basic items (ie, not anything au gratin) and it should be fine. Service was disappointing, though I am assuming our waiter was just having an off day. The drippy garlicky buns were yummy, and perfect for the restaurant.
Do I have to say anything about my Olive Garden lunch? Okay, I won't. :)
Happy Chef Dim Sum, Chicago Chinatown
Perfectly decent, medium sized dim sum place with good, clean flavors, relaxed (in a good way) service, and crowded, but not too crowded.
I would have liked to try some of the other newer Chinatown spots I found raved on here, but the choice wasn't up to me. And Happy Chef was good.
Heaven on Seven, 224 South Main St, Naperville, 60540 - (630) 717-0777
Went here for a sunday bunch date with my niece. She had the banana foster pancakes (which were really good) and they gave individual sized bottle of real VT maple syrup with it. Nice touch. I had the jambalaya. Which was delicious too. I didn't notice any crawfish in it, but it was still meaty, spicy, hot, a bit sweet, and well put together. Service was friendly too.
For a lunch place, it was not too pricey and fun. Though I wished I could have planned a little better and tried 10 West. Next time. Meson Sabika and Montage too.
Maggiano's, 240 Oakbrook Center Oak Brook, IL 60523
We ordered take out for dinner here. Nice big portions and pretty decent. That's the place the hosts like to order from.
Egg Harbor Café, 175 West Jackson Ave, Naperville, 60540 - (630) 548-1196
Last lunch before my flight home. I had the Swedish pancakes, which seemed crepe-ish, and were good. They had some savory crepes too, though it was a little overstuffed to be traditional crepes. Not bad, very friendly service. Coffee too was great, the thing with Ill is that they always offer cream instead of milk, which easily makes any cup of joe that much better. I hear it gets mad crowded sometimes.
Heaven on Seven was better (even for the breakfast items), but Egg Harbor was nice.
All in all, an excellent food trip, definitely something to build on.