This is a very simply laid out tool but it allows you to get lots of statistics on your Blog url suce WHOIS information, search results information, links analysis information and several other useful tools.
Whey they've done is provide you a single inteface to various site analysis tools via a framed window with a easy to navigate colored and tabbed navigation bar.
You simply enter the url of your blog and you just select the different tabs for each category and then select the specific tool.
All analysis are performed against your site from a single browser window session which make using all the tools very convenience.
I have not used all the tools extensive but right off the bat I've found the "link" category obviously very usefull.
This is great tool to use to how well connected your blog is getting from your blog marketing efforts. This tool is always a great way to find other sites to link to and other blogs to comment on.
This tool can also be extremely useful in allow you to do research on both competitor sites you are following and well a successful sites that you want to model and emulate.
You can certianly study how influential those other blogs are and plan your own blog marketing success strategy.
I recommend that you bookmark this site and a cool tool in your blog marketing and blog promotion arsenal. :-)

