The items, which currently only stack to 180, and are amassed in their thousands by doing dailies, will most likely be converted into a currency for patch 5.1 according to this tweet from Ghostcrawler:
Looks like we can turn Lesser Charms into a currency in 5.1. Whew.
- Greg Street (@Ghostcrawler) October 24, 2012
Mists of Pandaria is here! The level cap has been raised to 90, many players have returned to Azeroth, and pet battles are taking the world by storm. Keep an eye out for all of the latest news, and check out our comprehensive guide to Mists of Pandaria for everything you'll ever need to know.