Just to throw in a couple points.
The trivet is most certainly available in the U.S. It's available at many Weber retailers, direct from Weber's web site, and from Amazon. Be sure you get the right size for your Q2200. While on the subject, I use the Weber roasting shields instead of heavy duty aluminum foil. They're heavier, vented correctly and only a little bit more expensive than HDAF. The trivet and roasting shield gave me the very best roast chicken I have ever cooked...and that's comparing to hundreds and hundreds of really good chickens. The trivet is extremely well made from excellent materials. It cleans up like a dream. There's no other accessory that will get you a bigger bang for your buck than the trivet, in my opinion.
I bought an A-Maze-N Smoking Tube to use with my Q3200. Put a handful of pellets in the tube, light them and put it on a corner of the grill. Works great on the Q, where there's not a good place to lay a foil packet of chips.
The porcelain grid is one of my favorite features. Years ago Weber Australia recommended dipping a brush in water and scrubbing a hot grill. That method was withdrawn without explanation as to why, and you can still find the video on YouTube. What scant explanation you can find talks about problems in the body, not on the grill. Feeling that the method must have had some redeeming qualities, I modified it a bit, and have been cleaning my grid this way for close to a year without any problems. I bought a huge bundle of bar towels at Sam's. I soak one in water, wring out and fold it until it is a thick pad. I brush the hot grill with a Weber triangle brush, loosening up crud, then wipe with the wet towel. The porcelain cleans up perfectly.
Welcome to the Q family. You're going to love it.