Sony's LRX ebooks are locked to Sony Readers. However, in a couple of weeks Sony will be converting all their ebooks to ePub. See
Adobe ADEPT DRM for EPUB circumvented for what to do to strip the DRM. This is very easy on a Windows PC, just click on the ineptepub.pyw file and fill in the pop up form. It isn't absolutely certain that this will work with Sony ePubs, but most likely it will. The Stanza app reads DRM-free ePubs on a Touch.