I have generally frowned on the weather display on intranet pages. But I saw this and found it interesting. This SharePoint webpart from Bamboo Solutions could display the weather for all or our offices in one place, side by side.
Comparing the weather is much more interesting, than just seeing your weather information. In LA it is always going to be sunny and 80 degrees. But that becomes much more interesting when it is displayed next to the weather in Boston (especially on a murky day)
Thanks to the SharePoint Product Group for publicizing this on the Microsoft SharePoint Products and Technologies Team Blog.