NPD has released the top 10 best selling PC games for February. Here are the results:
February 2008

1. Call Of Duty 4: Modern Warfare (Activision)
2. Sins Of A Solar Empire (Stardock)
3. World Of Warcraft: Battle Chest (Blizzard)
4. The Sims 2 Free Time Expansion Pack (EA)
5. World Of Warcraft: Burning Crusade Expansion Pack (Blizzard)
6. World Of Warcraft (Blizzard)
7. The Orange Box (EA)
8. The Sims 2 Deluxe (EA)
9. The Sims: Castaway Stories (EA)
10. Crysis (EA)

Stardock's Sins of a Solar Empire was #2 overall for the month of February despite retail availability occurring near the middle of the month. 

With the upcoming merger of Activision and Blizzard, Sins of a Solar Empire is the only non-EA, non-Activision/Blizzard game in the top 10 at retail.

Stardock relecently released Sins of a Solar Empire v1.03. See the Sins of a Solar Empire website to learn more.