Looks like there are two mailing lists according to the website... the notification one doesn't seem to be working. I haven't gotten a response out of it when I tried subscribing (twice) last week:
Email Notification List
Get on the list! Be the first to learn of important updates, enhancements, new products, and website changes by subscribing to the REBOL Notice List. To subscribe type this line in REBOL:
send [EMAIL PROTECTED] "subscribe"
Or, you can subscribe by sending an email to [EMAIL PROTECTED] with "subscribe" on the subject line. (Your address will be kept confidential.) You can unsubscribe at any time.
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Brian S.
Kokernak
[EMAIL PROTECTED]
http://headrush.net/bsk/