I'd like to keep 10.6 support in the open source app I help out with but there are so many improvements in 10.7 and 10.8 from a developer point of view that the

I'd like to keep 10.6 support in the open source app I help out with but there are so many improvements in 10.7 and 10.8 from a developer point of view that the latest release will be the last to support 10.6 (and 32-bit macs). By improvements I mean genuine time saving features like base localisation, not "ooh shiny dot syntax!".