I found a couple of web sites that offer MSX ROMs. Get 'em while they're hot!
http://www.planetemu.net
http://pulciaro.risorse.net
You'll find many of these games similar in quality to what you might find on the ColecoVision, but the big difference here is that there are many, many more games on the MSX, including a lot of arcade games ColecoVision fans never had the chance to enjoy on their system. Also, you'll notice there are a handful of ColecoVision games ported TO the MSX, including Alcazar: Forbidden Fortress, an early adventure game similar in many respects to The Legend of Zelda.
When I look at all these games, it makes me wish even more that we could clone Eduardo Mello and put all his clones to work on new ColecoVision games.
JR
P.S. Hey, Eduardo, I'm looking at Mr. Do!'s Wild Ride, and the game is actually *smaller* in size than Sky Jaguar. Would it be feasible to translate to the ColecoVision as well?