From http://blogs.sega.com/usa/2010/06/04/conduit-2-multiplayer-map-poll-your-favorite-conduit-1-map/ :

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We want your vote! Conduit 2 is coming and it’s bringing in a whole ton of improvements and additions, including a host of new Multiplayer maps. Pick your favorite multiplayer map from The Conduit – if it gets enough votes – we’ll add it into Conduit 2!

With your help, we are picking two maps, one here from the forums and another from our Facebook Conduit community. Vote for your favorite map and, if you like, tell us why you picked it!

Sega Forums – Vote Now

Conduit Facebook – Vote Now

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The 7 maps are

1. Bunker
2. Warehouse
3. Streets
4. Sanctum
5. Pentagon
6. Infirmary
7. Complex

Which of these do you want to appear in Conduit 2 MP as well? As I'm writing this at this stage, Sanctum and Streets are leading in the Sega Forums. In Facebook (poll is in the Boxes tab, around 800 votes so far), Streets leads by far, with Pentagon in the second place.

I realize this is about 10 days old, but I don't recall seeing it here, and I believe you can still vote.

any map but Pentagon...lol Streets, Sanctum, or Infirmary were awesome.

Well then you should go to the Facebook poll and vote for Sanctum and Infirmary. Streets is in a clear lead, but Pentagon is presently second. Sanctum and Infirmary are 3rd and 4th.