Funny you should ask....
I just got a new booster seat yesterday. It's a Century Next Step DX. Very nice seat, I'll post a review soon. In any case, Century has a new EZ-LATCH upgrade kit to convert any of their seats since 9/97 to LATCH. I found it for $25 at Babies R Us.
Works well, at least on the Next Step in the Odyssey 2nd row with LATCH. I wish they had made a push-button tension release, like the one on our Cosco Triad, but their anchor release mechanism is nicer than the Triad.
The Roundabout LATCH has been delayed. They won't even respond to my email questions with an estimate any more. They do have a LATCH toddler seat being released soon. It's called the Expressway. It's basically a Roundabout with an upgraded harness and LATCH than can only be used front facing from 20-40 lbs.
Feel free to visit our new sites at:
http://www.car-seat.org
http://www.car-safety.org
There's an updated review of my Cosco Triad in the Odyssey in the carseat forum at car-seat.org.
If you happen to be in Northern Illinois, there's a list of carseat checkup events there, too. If you have any questions on carseats in the Odyssey or other vehciles, you'll probably find an answer on our new forum or in our links.
[This message has been edited by caviller (edited 05-04-2001).]