If you sign up for their email, you only get the first deal of the day (midnight MT time).
I recently d/l'ed their Desktop Alert and it works great. You get a popup above the system tray and an audio tone for each new item.
You can also get email alerts from http://www.sacattack.com/ and they send one for every new item.
The best, however, is leaving a window open, keeping an eye on the site and hitting F5 (refresh) when the qtys get low. Sometimes popular items, like goggles, sunglasses, woolwear and Arc'teryx are sold out in minutes.
Careful though, it's habit forming!