mine don't always have to wait unti Christmas/Birthday - 2 of them have birthdays right at the beginning of January (they don't get much for their birthdays usually).
That said, we don't have much big stuff. ds does have an (old version) x box and they all have bikes, but that's it.
I think they will get a wii between them this year, although ds has also expressed a need for an ipod (I don't think he knows why he wants one though).