IIRC this has been available on Entanet for quite a long time. Am I right?
If so, apparently there can be drawbacks - see this thread.
Any good or bad experiences please? Just want to form a view on the subject.
FWIW: I've been using Entanet's IPv6 offering for a week or so now - natively without going via a tunnel of any sort.
So if you want IPv6 then ask your reseller for it to be enabled and for your own /64 to be routed to you.
I can't say it's plain sailing though - you will need either an ADSL router that supports it natively, or use a modem in true bridge mode (e.g. Vigor 120 which I'm using) and then run PPPoE on your own router - either a Linux/*BSD box, or another router that supports it, and supports IPv6. I've also had MTU issues too, but I suspect that might be an artifact of running IPv6 over PPPoE via a PPPoE to PPPoA bridge...
You'll also need to learn IPv6 firewalling because you can't trust NAT anymore
(Well, you can NAT IPv6, but let's face, it the whole point of having a virtually unlimited supply of IP addresses means we shouldn't ever have to!)
There isn't a lot out there on ipv6 yet, but unless someone makes a start, then that's not going to change. I'm looking to give all my hosted servers/websites, etc. their own IPv6 addresses early next year as soon as my co-lo providers gets their systems up to speed.
Some estimates of running out of IPv4 addresses put the date as soon as March 2011! The Internet won't stop then, but I suspect new allocations will slow down as the ISPs do a bit of squeezing and consolodating. I reckon it will still last for a few years before there is a serious problem, but why should we wait for that to happen?