Late last week, Zynga launched CityVille, its latest flagship title that&'s sure to draw millions of rabid fans. The game represents Zynga&'s entry into the very popular (and already-crowded) city-building genre, which also includes Digital Chocolate�a4���a4�s Millionaire City, and competing titles from Playfish, Crowdstar, and Playdom. But Zynga&'s got this down to a science, and its late start hasn&'t kept CityVille from quickly gaining a ton of users.

Zynga reports that in the game&'s first 24 hours, over 290,000 people played CityVille. That&'s more than double the 116,000 that Zynga&'s last title, FrontierVille, saw in its first 24 hours. And FrontierVille is no slouch �a4���a4� it&'s now at 6.5 million players a day, with 29,872,423 monthly active users.

Zynga says CityVille is its biggest launch to date. Some of this quick growth likely stems from the fact that this is Zynga&'s first global launch �a4���a4�a4s��the game went live simultaneously in English German, Italian, Spanish and French.

We did a full run-down on CityVille around three weeks ago (it was slated to launch in mid-November) but Zynga decided to delay the game so that it could make a few last adjustments before launch. Doesn&'t look like the delay hurt much.

One other important thing to note: Zynga says that these 290,000 initial installs were primarily &8216'organic&' �a4���a4�a4s��they mostly came from players sharing status updates and inviting their friends. Zynga says that it hasn&'t yet activated the cross-game marketing that will eventually roll out to its other popular games like FarmVille and FrontierVille. When it does, expect to see CityVille&'s user count jump (again).

Here are a few other stats Zynga sent over:

a4s��2.7 million residences have been built

a4s��More than 500,000 bakeries have been built

a4s��5 million sections of road have been laid down

a4s��25% of players have set up franchises in friend&'s game boards