Welcome 
Brad has left Westlake to work at Aspyr, so he knows nothing of new Civ3 releases. Before he left he passed over a release version 1.29 to MacSoft for final QA and release. That was 6 to 9 months ago an we've seen nothing more. So don't even hold your breath for 1.29 to be released officially.
As for PtW or Conquests? See those flying pigs? Both expansions use a Microsoft-proprietary Windows games networking technology called DirectPlay that no one has ported to the Mac - they'd probably be sued if they did. And I understand Civ4 will still use the same protocols.

Brad has left Westlake to work at Aspyr, so he knows nothing of new Civ3 releases. Before he left he passed over a release version 1.29 to MacSoft for final QA and release. That was 6 to 9 months ago an we've seen nothing more. So don't even hold your breath for 1.29 to be released officially.
As for PtW or Conquests? See those flying pigs? Both expansions use a Microsoft-proprietary Windows games networking technology called DirectPlay that no one has ported to the Mac - they'd probably be sued if they did. And I understand Civ4 will still use the same protocols.