Just in case you didn't already know, the SiN Episode 1: Emergence preload has begun, you can also pre-purchase the game for the discounted price of $17.95, without doing to many sums that probably about £10 and also includes Sin 1 and Sin 1 multiplayer.

This month's Steam marketing update also says that preloads of Half-life 2: Episode 1 will begin on May 1st.