You may have read about the "end" of assigning IPv4 addresses. What actually happened is that the last so-called "slash-eight" block has been assigned to the various regional registries. While the Asia/Pacific registry is expected to run out of IPv4 addresses in a matter of days, the registry serving the US has enough left for a few months.
What does this mean?
This means that new Internet users may not have access to an IPv4 address, which is the addressing scheme in use since the start of the Internet.
The long-standing transition scheme calls for instead assigning IPv6 addresses. There are enough IPv6 addresses to last for millions of years at least.
But IPv6 addresses are only good for "IPV6 packets" -- they can't be used in the IPv4 packets currently being sent over the Internet.
Thus there's a really-big hiccup coming, where end-users will need to send IPv6 packets instead of IPv4 packets. This will come as part of your normal Operating-System upgrades -- and your computer may already be capable of sending and receiving them.
Alas, that will do no good unless every hop along the way is able to forward IPv6 packets. And worse, within the United States, that ability is rare.
JLC.net is committed to any necessary upgrades to enable forwarding of IPv6 packets, and ensuring that our customers have access to as many IPv6 addresses as you may need.
But we can't do it yet: we need to have upstream providers able to forward IPv6 packets. As of today, April 25, 2011, we don't.
We have arranged for collocation space at an upstream provider which has contracts signed to do the necessary magic to get there; but the process will be very much experimental for perhaps the rest of 2011.
Shortly, we will be moving a webserver which serves customer domains to this collocation space.
Since it is necessary to coordinate three locations: the old collocation space, the new collocation space, and the JLC office which handles phone support, we don't yet know when the changeover will happen (as of April 25th); and we probably won't be able to give a full 24-hours notice of that time. We're hoping for early Saturday morning (April 30), but if the only time we can coordinate three locations turns out to be earlier (or later), we may go ahead without 24-hours notice.