This is getting ugly.
This first link is to the SFI Foundation press release from 4/21/2010, in which they explain that Impact Racing products suits made in 2008 and prior years are to be permanently decertified. The SFI Foundation believes that non-compliant materials were used in the manufacture of the older suits, and that these suits present a safety risk.
Impact responded the following day with a press release, which may be found
Here (I'll change this to a PDF link when one becomes available), arguing that the SFI process is unfair and that SFI standards are flawed.
This
third link is the SFI Foundation response to Impact's 4/22 press release. The accusations leveled against Impact are quite serious. If true, then there is no choice other than decertification.