Mapping with MS Excel

So you want to make maps right 'inside' MS Excel? Here are a few options:

• Esri Maps For Office (What's New in Version 4.0)
• GIS.XL
• Excel Map Hack (free!)
• Heat Mapping with MS Excel (this is actually choropleth mapping, not heat mapping, but still interesting)
• Interactive Heat Mapping with MS Excel (and MS PowerPoint)