This is for you guys and gals who're in web business. The following websites gives you free monitoring services for your website. The send out alerts when your sites are down and send you reports of them at the end of the week.
This is the first one i came across and its very basic and to setup. And has RSS feed alert if you wish to get alerted that way.
This is also another free web monitoring site that i use. There's nothing much here though. Extremely simple site.
This also another website that i use to monitor my site. They monitor your site from about 1hr to 3 hr intervals.
And finally the best of all the free web monitoring sites, mon.itor.us. This site has all the monitoring features a webmaster would want. Charts, graphs, internal monitoring, benchmarking and many many more from this site for free. This is something that you should have definitely.
You should try these specially the last one. Have fun monitoring your sites.