Took me a little while to sort out that I didn't mess up my firewall rules on the proxy server at home. :-) Google, or at least the datacenter(s) their DNS was sending me to was down for a minute or three.
[root@freja ~]# telnet www.google.com 80
telnet: connect to address 126.96.36.199: Connection refused
telnet: connect to address 188.8.131.52: Connection refused
telnet: connect to address 184.108.40.206: Connection refused
telnet: Unable to connect to remote host: Connection refused
A few days ago del.icio.us was down for a little while - bye bye bookmarks! That was worse actually. A small app to mirror del.icio.us bookmarks locally would be helpful for backup in a situation like that.