The latest image of Elenin from Michael Mattiazzo (Sept 14th, taken under difficult circumstances0, show a much reduced comet which has faded to magnitude 10 or so. It is doubtful that it will be bright enough to see in the SOHO LASCO cameras. We will probably have to wait until October for powerful Earth-based telescopes to try and find if any of the comet survives.
UPDATE: Comet Al reports that Elenin is still visible in the STEREO HI1A imager, see his animation in Flickr. He estimates the comet is around magnitude 11 or so, pretty much agreeing with Michael's earth-bound estimates.