Elpida has demonstrated a strong desire to stay in the DRAM business and this underscore's that. Elpida is not looking to rescue anyone. They want to control the business. Taiwan's proximity to Japan helps too.
Elpida's persistence is impressive. They've launched into development of an R&D center in Taiwan and certainly have for some time made clear their interest in a working relationship with the Taiwanese DRAM companies, and they are reportedly looking at listing their shares in the Taiwan Stock Exchange.
Costs seems to have been a problem for Elpida, and as noted here by their president, scale is a huge issue. They have their eye on a solution to both these problems (and that's not easy to do in the segments where Elpida operates) and they look as though they are going to keep at it.