BucketList.net - Bucket list ideas, advice and support
Lifetick - Lifetick is an online Goal Setting application with a stylish, easy to use interface.
Life Listr - ***AS FEATURED BY APPLE***
Beeminder - Beeminder
Bucketlist.org - Log and catalog all the stuff you want to accomplish before you expire.
Joes Goals - Joe's Goals is an online goal-tracking website. 100% Free. No Download Required.