Date: 5/18/2008 5:33 pm EDT
You have several options.
1) If the height difference between the Avaire tile and the capret are about the same, you can leave it as a butt-joint. If you do, I'd suggest cutting the connecting tabs off the tray (if it is not a cut edge already) so you can get the tile and carpet as close as possible (minimize the gap). Make sure you secure the carpet down along the edge with a double sided carpet tape. And, I'd suggest running a bead of construction adhesive under the outside edge of the Avaire tile. This is how we've finished our carpet-to-Avaire tile transition between our Master Bath and the bedroom.
2) There are a variety of transition components that can be placed between the Avaire tile and your carpet. Most of them will have an anchoring element that attaches to the floor, and a finished transition piece that plugs into the anchor. I've seen these in wood, metal, and vinyl.