IEnumerable<T> and ForEach()

Why is there no ForEach() extension method defined for IEnumerable<T> in System.Linq.Enumerable for .NET 3.5? There is a ForEach() on Array and List<T>, but not for IEnumerable<T> which would seem a fairly natural place for it.

public static class Extensions {
  public static void ForEach<T>(this IEnumerable<T> source, Action<T> action) {
    foreach (var item in source) {
      action(item);
    }
  }
}

For some reason, when I'm in LINQy mode, my natural reaction is to try ForEach() over foreach, and I'm always a bit surprised when it doesn't work for IEnumerable<T>:

//Lambda goodness:
parameters.ForEach(parameter => doSomethingTo(parameter));

//Old stylz:
foreach (var parameter in parameters) {
  doSomethingTo(parameter);
}

Bit nit-picky I know, but I noticed Daniel Cazzulino made the same observation:

"I added a ForEach extension method to IEnumerable. How come it's missing in .NET 3.5? :S"

So at least I'm not completely alone on this :-) Anyone else wonder about this?