But for now I'll wait and see what they have to say in clarification of this policy.
That's pretty much what I'm doing. Having a TOS and the way they enforce it are two different things. I didn't see an email from them to us members so it may be a change so they cover their a** unrelated to data contributors.
With the large amount of local traffic hitting my site from their weather radio program, I'm definitely waiting and seeing.
I also wanted to point out that in the past year WU has:
1) Added google mesomaps
2) Added their own form of Ajax to pages
3) Added rapid fire w/ option for sites to post on their own sites (although Ajax kicks it's butt!)
4) Added lightning data w/ cooperation of StrikeStar
5) Added weather radio
In other words, WU is being innovative in their website and potentially exposing my and your websites to a much larger audience.
It's nice to talk dump-and-switch but you will need to think quite hard on how many folks currently use WeatherForYou. Personally, I don't use Joe's website nor send him data. It's not that I don't like Joe or respect his efforts, it's just that I see no benefit for my site or visitors. On the Internet, it's all about numbers and exposure.... Weather Underground has vast amounts of both.
I want to thank Ken for pointing out their new TOS (who looks?) and taking the initiative to email WU about it. Can I nominate him again?
In the meantime, I finally switched my advisories page to be entirely NOAA data. That leaves just WU's radar data on my radar page (as a backup to GRLevel3).