Well you'll have to take my word for it, but about an hour ago this link had a detailed account of a merger between Dynix and SIRSI. Long story short, good news for everyone and nobody will have to change platforms. The company URL will be http://www.sirsidynix.com Obviously this was meant to be announced at ALA, but it was delivered via the official SIRSI OneSourse newsletter RSS feed (that evil RSS! ;-)
Oh, and I care 'cause we're a SIRSI shop here at the U of C