It looks like White Labs will be phasing out the vials for homebrewers this fall and replacing with the new FlexCell process.
http://www.whitelabs.com/homebrewernews
http://www.whitelabs.com/files/homebrewer-fact-sheet.pdf
http://www.whitelabs.com/homebrewernews
http://www.whitelabs.com/files/homebrewer-fact-sheet.pdf