IP Address Space (IPv4) Shrinks to 5%, will run out in 2011

IPv9 is a hyped up Chinese project that is not accepted by IANA as a valid internet protocol. So you can essentially forget about it being "best". Rumors about it being intoduced in china in 2004 were still being dispelled as recently as this 2008 article:
http://www.telecomasia.net/content/stra ... nas-ipv9-0

And being "best" isn't the question. It's a matter of relatively few allocatable IPv4 addresses remaining, hence the creation and necessity of IPv6.

Oh wow. I'd written IPv9 off as being one of Assneck's jokes.

I was just looking on the IANA site, here http://www.iana.org/numbers/, and came across an XML document ("Internet Protocol v4 Address Space") that looks like the current state of allocation, but I'm not sure. According to that document, there seems to be 7 unallocated ranges at the moment.

Looks like you are correct. Seven left at the moment. This gadget is predicting February 2nd 2011 as the day IANA will run out.

http://www.potaroo.net/tools/ipv4/

//wonder if that's a sign the groundhog will see his shadow?

It's strange to hear about IPv9

Probably because you live in Vietnam, not China:

So what kind of an effect will it have if recently my isp advised me to disable my IPv6?

Nothing unless your ISP switches to IPv6, then you will just need to enable it again. Not a big deal.