UPDATE 4/25/10:
Alright, I have done some more research and I have more accurate suggestions. (Sorry I didnt just edit my last post but I wanted to go in full edit mode.)
My first suggestion is about the fonts. Now I believe weatherscan used the "Akzidenz Grotesk Medium" set for the fonts; Medium, Medium Condensed, and Medium Extended. I have created a few images in powerpoint using the fonts listed above.
In the CC picture below, I used Medium Extended for the clock, conditions on the left, and the city name.
In the second CC picture below, I also used Medium Extended for the city names.
In the 36 hour picture below, I used Medium for the description, and Medium Extended for the city name and time of day.
For the Almanac, I used Medium Extended for eveything besides the day of the week.
And for the intro screen, I used Medium Extended for the message.
My only other suggestion right now is about the transitions. If you could slow down the faded transitions from slide to slide, and take out the black transitions when going from the Local Doppler to the CC, and Local Doppler to 36hr I think that would be better.