I ran across this tonight and I think it is SO slick. If you use Lightroom and have the newest 1.3 version installed, you can use a plug-in to expand your "export" capabilities to include uploading directly to Zenfolio or/and Smugmug or/and Flicker!
Oh this is just SOOO dang cool. Certainly is a great addition for my work flow.
You can read more about it here:
Jeffrey Friedl’s Blog Blog Archive Lightroom 1.3 & Export Plugins for SmugMug and Zenfolio
I hope this isn't a redundant post, I scanned to see if this had been posted before and didn't see it. I am pretty pleased with this new functionality.