I have used the standard MarketPress importer but my client is keen to manage her 33,000 products off-line via CSV (albeit with some work-arounds, like product images [many are dups]).
My research around here indicates that Variation bulk-import isn't a feature (yet)?
Is this likely to ever happen?
If not, can I have some hints what would be required so I can point my developer in the right direction, perhaps building some functionality?
Do you have a paper we could read / digest?