Other than break and continue support for loops, I believe that all of this has been implemented, in spite of the author's complaints about r1.5.
I'm not entirely sure about NULL support in #if clauses... I haven't yet upgraded. Does null really not compare correctly to NULL?
Comparisons work as expected, now (for instance, int and long); the author says so in his post. Not sure why he included this in his with list.
String-to-number casting is sort of done.... numbers are converted to strings. My understanding is that if the types are not the same, they are both converted to String and compared. I believe this creates the desired effect.