I'm gonna revive this thread because I was just reading about an upgrade to National Geographic's Topo! software. The state series will continue in its current form, but apparently next month NatGeo will be releasing its new Topo! Explorer and Topo! Explorer Deluxe software ... which will feature the map detail of the state series, but cover the entire US! But wait, there's more... it will ALSO feature satellite photography which can be viewed together with the topo maps in a semi-transparent/layered view.
And the good news? Its FREE! Ok, there is a catch. It is generally web-based, and accessing and viewing it is free. The nice thing about the web-based interface is that the photography is updated continually. They claim its more detailed than the photography available on Google.
If you want to do the things that you are used to using Topo! for, you will need to purchase an application for your computer that uses the web interface, but still allows you to save tracks, waypoints, elevation profiles, etc. and interface with your GPS (or print the maps). If you are a current owner of Topo! state series, there is no charge for the Topo! Explorer upgrade.
Anyway, I just bought a new computer and was looking to upgrade my Topo! when I noticed this new version is coming out. I've always thought that Topo! was awesome, so I'm very excited about this new version and features.
Does anybody know any more about this, or do I have to wait until it's released next month to learn the real details?