Keep your eyes peeled, OP, there are more. Abit and alot are common, but watch out for aswell, infront, infact and incase.
I've also noticed common compound words being separated, which is equally irritating. Just off the top of my head, I've seen "no where", "now a days", "hind sight". "what so ever", "in tact" and "night mare" this past week, just on Mumsnet. Yes, I'm a sad old pedant!