Whoa, he.net is alive and kicking. These guys used to run an efnet server back in the day.
And I heard they do free IPv6 tunnels. Pretty cool.
HE is awesome.
If you own a domain name, a lot of registrars let you query some https endpoint to update DNS, which you can plug into firmware like DD-WRT. Namecheap, for one, does. I know this because I did it this morning after no-ip stopped working for me.