http://forums.xbox.com/5349423/ShowPost.aspx
and here is the specific part i'm linking too
QUOTE
Today, Xbox Live unveils Xbox Live Arcade Wednesdays, a new program that will provide a regular launch schedule of new Xbox Live Arcade games for gamers worldwide. Starting today, Xbox Live Arcade games will now go live worldwide on Wednesdays at 0800 GMT (Midnight Pacific) – hitting gamers around the world all on the same day.
Xbox Live Arcade Wednesdays kicks off with a blockbuster summer schedule of eagerly anticipated retro titles. Gamers looking for a blast from the past can download ‘Frogger’ – the beloved Konami classic arcade title – today on Xbox Live Arcade. Other Xbox Live Arcade Wednesdays titles debuting in the coming weeks include ‘Cloning Clyde’, ‘Street Fighter II’ Hyper Fighting,’ ‘Galaga’ and ‘Pac-Man.’ To date, Xbox 360 gamers have downloaded more than 5 million Xbox Live Arcade games and the release schedule sizzles all summer long, with the following titles arriving on Xbox Live Arcade:
Ø July 12 – Frogger
Ø July 19 – Cloning Clyde
Ø July 26 – Galaga
Ø August 2 – Street Fighter II’ Hyper Fighting
Ø August 9 – Pac-Man
hopefully this ends up being accurate, because i can't wait for frogger, galaga, street fighter, or pac man