If anyone was looking forward to the news of Sega's merger with Sammy or Namco, then I'm afraid you'll be disappointed. All talks between the companies have apparently ceased and negotiations have been terminated - Source.
I really hope this doesn't mean Microsoft will be looked at for the merger. I read an interview with someone (don't remember where) from MS X-box. They pretty much said anythings possible when dealing with mergers. However, he had no info on merger talks with Sega.
I was really hopefull for the Namco merger. Oh well. Maybe they will remain independant.