This may be old hat for some of you, but if you have a MobileMe account setup on your Mac, you have access to said Mac from pretty much anywhere on the internet you like. This comes in the form of a IPv6 DNS entry that gets created in the mac.com domain. It’s form is pretty simple:

workstation.username.members.mac.com

So, if you call your workstation mycoolmac and your MobileMe username is lookatme, the DNS entry for your system would be:

mycoolmac.lookatme.members.mac.com

If you have “Remote Login” enabled in Sharing, you are good to go. From another machine (that supports IPv6 SSH), just connect:

ssh -6 mycoolmac.lookatme.members.mac.com

It will ask you for the password on your remote Mac, and you’ll be logged right in. Sadly, this doesn’t yet work from my iPhone’s SSH client… yet.