Everyone around my age in Canada knows reboot. It was a CGI show that was made in Vancouver and aired mainly in Canada. It may have actually been the first full episodic CGI show ever from what I've read. For those who missed it, when people aren't playing video games the NPC's are living happily in their world until you start up a game and start playing against them. This show was solid in it's premise but ended up being standard fare in terms of a typical YTV cartoon. Reboot came back with stronger storytelling and more mature themes after a brief hiatus (when the show creators worked on other projects like Beast Wars). The show took a grittier take on the fun-loving cartoon which I thought looked great, but by that time I had outgrown the show and would only catch an odd episode or re-run.
It should also be noted that the show is getting a... revival under the title "Reboot: The Guardian Code". It was announced a while back, so time will tell if anything comes of it.