Partitioning improvements query

Hi all, I was just wondering if any progress has been made on improving 
partitioning, particuarly performance wise. I've found a few documents 
on the web, for example: 
http://wiki.postgresql.org/wiki/Table_partitioning and 
http://wiki.postgresql.org/wiki/Image:Partitioning_Requirements.pdf, 
http://wiki.postgresql.org/wiki/PgCon_2008_Developer_Meeting#Partitioning_Roadmap 
which mention improvements to partitioning, but I can't find any info if 
these have been acted on.

Just curious as things like pushing limits down to the sub queries would 
be a great feature, etc

Cheers

John