I read about the new version of the digital elevation model at 30 meters (SRTM 30 meters), but I can not find from were I can download it.

some sources:

http://glcfapp.glcf.umd.edu:8080/esdi/index.jsp

http://asterweb.jpl.nasa.gov/data.asp

http://www2.jpl.nasa.gov/srtm/