As suggested here: http://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=461211&SiteID=1
it would be nice to have "dynamic" partitions. i.e. A new member appears in a dimension and a partition is automatically created for it.
An easy explanation for this being useful is having a partition for each year in teh time dimension. Whenever a new year appears - a new partition is created.
I also think it would be nice to have a logical "grouping" of partitions within a measure group so that we could place all these auto-partitions into a group and say "Process all of those please". Hope that makes sense!