I get a lot of e-mails when Netflix streaming movies and TV shows like Lost expire, and it's easy to miss the expiration notices in your streaming queue. Feedfliks has put together a "Streaming Central" page that shows "Coming Soon to Streaming," "Just Arrived," "Expiring Soon," and titles you're "Too Late!" for. You can sort each category alphabetically, by rating, genre, and release year.
You can also follow @Feedfliks on Twitter to keep informed about streaming releases and expirations.