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do a lot of people still play on bnet?
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"There are currently 6,109 users playing 1,026 games of Starcraft (original) and 151,554 users playing 17,025 games on Battle.net"
Btw, Mark...
When you first install SC/BW and try to connect to Battle.net for the first time, it won't work.
Blizzard has changed their servers around since the last versions of SC/BW were stamped. You will need to download a patch from the Battle.net website before you can connect to the servers.
SC/BW Patches