As for the whole comma issue:
Language evolves. We all know that.
Now, I use the Australian Style Guide, the Australian National Training Authority Style Guide and Macquarie Dictionary for my editting work (for those who didn't understand my German, I am an editor of textbooks and an instructional designer).
The move in Australia is to 'modernise' grammar and use minimal punctuation for all textbooks. The rule of thumb is, if you require a number of punctuation marks for your sentence to be understood, the sentence can be written clear (possibly by breaking it up into 2 or more).
Now, as blackwidow was doing an AUSTRALIAN assignment, I advised him on the Australian style.
"3. Sets of commas are means of separating items in a series, for example: The billabongs at sunset drew flocks of galahs, gang-gangs, budgerigars and cockatoos of all kinds.
A curious amount of heat has been generated over whether or not there should be a comma between the two last items in such a series ( the so-called serial comma debate). Older editing practice tried to legislate on the matter and insisted that there should always be a comma before the 'and'. Yet Webster's Standard American Style Manual (1985) admits that the serial comma is as often absent as present in its citation files. The ongoing trend is to use the final serial comma only when it is needed to prevent ambiguity, as noted in the British English by the authors of 'Right Word at the Right Time' and recommended by the 'Australian Government Style Manual'. In a sence like the one shown above, there is no problem if the serial comma is absent. However, it's a different matter with the following:
Drinking their fill at the billabong were rabbits, emus, flocks of galahs and wallabies.
The word flock does not collate with wallabies and a comma before 'and' to separate 'flocks or galahs' from 'wallabies' is desirable." Peters, P. (1995). The Cambridge Australian English Style Guide (pp.147-148). Australia: Cambridge Unversity Press.