Oooh! A nit war! :-) It's in dictionary.com
[link|http://www.dictionary.com/search?q=irregardless|Irregardless].
Actually, I agree that it's poor form. But so is "aint" and that'll never be purged.
As long as people don't start writing the way many pundits talk it'll be ok, IMO.
"The point is is that ..."
Aargh!
:-)
Cheers,
Scott.