You can also use Google Alerts if you have a niche and use the alert for your primary keyword.
The Google Alert I mainly use though is my lou16 one and it was interesting to see which directories showed up first when I submitted a lens in my experiment last week - squidom showed up on an alert within hours!
How Do I Set Up A Google Alert?
It couldn't be easier, first go to Google Alerts
Next add your search terms and I leave it on everything, but you can choose to just be notified about blogs, news, videos etc. Decide how long you want your email to be and enter your email address.
Now you just wait for the alerts to appear in your mailbox.
On a personal note I'm back overseas next weekend, I'm hoping to have time to still post to this blog, but if I don't respond to questions it's just because I'm not at home and I will get back to you when I can.