Anybody know anything about it/them? 

I get the following message during startup:

  Promise Technology Ultra DMA/ATA Bus Master IDE Accelerator (RAID 
  mass storage, revision 0x01) at pci0 dev 18 function 0 not configured 

I thought it was a popular card so I'm a bit suprised it isn't supported.  

I poked around in the 1.4 sources.  I found an entry in the list 
of known PCI devices but nothing to hook it up to a driver.  Not 
too surprising since I didn't see it mentioned in the supported hardware 
list. 
   
Did I miss something?  Anybody working on it?

[I think the "Raid" part is bogus.  It's just an IDE controller.  
It may use the Raid device type code for some PC related reason.]