From the press release:

LizardTech, a division of Celartem, Inc., and a leading provider of software solutions that make it significantly easier to manage and distribute digital content such as aerial photography, satellite imagery and scanned color documents, today announced the release of GeoExpress 5.0 SDK. This latest release of the SDK offers unlimited encoding capabilities to both MrSID and JPEG 2000 and exposes functionality contained in the GeoExpress 5.0 standalone product including JPEG 2000 encoding, NPJE/EPJE profiles, support for WKT-based spatial reference system metadata, and area of interest encoding of imagery to MrSID Generation 3 (MG3) as well as JPEG 2000.