Nope, ER and All Seas were never the same company. I can tell you this, anyone who is using a needlewheel based Sedra skimmer is getting their pump from All Seas. They have a an exclusive contract with Sedra for the needlewheels.
The recirced ASM are pretty amazing. We do them all the time.
All Seas Marine has recently released a new skimmer, the ASM Mini. We just got our first one in, I have taken several pictures and posted them.
http://www.asmskimmer.com/ASMMini.htm