I haven’t seen anything official yet. So, this may not be a permanent change. However posts appearing in the SL Forum are saying people are seeing 1-prim, actually PE, minimum cost for mesh objects.

If this remains the minimum cost for mesh objects, it is a nice reduction in mesh cost.

See: August 3–PE down!! 1 prim mesh is here! by Vivienne Daguerre, a regular attendee of the Mesh Upload Group. Also, Ashasekayi Ra asks: New Server Weight?