Every year or so I like to remind people that if they're still subscribed to my old web feed to please update their blog aggregator:
In April 2009 I moved domains, and two years and one month later Google Reader is still reporting 45 people are subscribed to the old feed. I appreciate your readership more than perhaps life itself, but if you could do me a favour and resubscribe with the new address, then unsubscribe from the previous one, I'd really appreciate it! Why doesn't Google do this for us automatically?
I'll still keep it registered, but one of these days I'd love to retire that old domain with all its redirects, and stop paying my webhost to park it for me.