Considering the fact that Link Diagnosis is a completily new tool, it already offers some interesting information. Based on Yahoo API, by some already referred as the best tool in the category of link analysis tools, IMHO is on the best way to be one of them…
The Link Diagnosis Tool offers clear interface, detailed data information on backlinks (PageRank, number of links on the certain page, anchor text that leads to the analysed page, quality link results, etc.)
All obtained results can be arranged according to many factors (PR, alphabeticaly, etc.), and the results look like this:
You can export results to .csv file, which is very handy if you want to document analyzed data.
For full functionality you will need to install Link Diagnosis plugin for Firefox. You can download it here.