Yahoo's site explorer tool is a great tool to check your links as well as competitor links. A WebmasterWorld notes something fairly clear to most users of the tool, that Yahoo! seems to order the links in order of some quality metric.
Let's take a look at the inlinks to the home page of this site. The links consist from the Official Google Blog, the Yahoo Search Blog, Techmeme, Search Engine Watch Blog, Search Engine Land, OakWebWorks.com (a weird one), Ask.com Blog, Search Engine Blog, and then more links from the Google Blog. As you dig deeper into the links, the order may not seem to be so apparent.
WebmasterWorld senior member, SteveB said, "Yeah, the first batch have always included the most valued or whatever. However, #750 seems definitely not prioritized over 50,000 other links."
Forum discussion at WebmasterWorld.