This is bound to have a serious effect on my use of Google Reader. Lifehacker posted a utility allowing you to create an RSS feed for your Twitter account. I just massively increased my feed list, but this might overcome a problem I've been having with Twitterific on my iPhone. For some reason, I can't mark a post as a favorite anymore. Maybe I need to wait for the next update.
Check it out. This will allow you to mark posts for further action, or to search through your Twitter list. Twitter's archive and search functions are far from perfect, and this is bound to help a lot.