Yahoo! has apparently redone it's mobile portal site; some info is here:
http://www.palminfocenter.com/view_story.asp?ID=7234
I just used Palm Web Pro on my Tungsten T3 to view the site, and I don't see why you couldn't use iSiloX/Sunrise/etc. to scoop the site. And apparently it has some My Yahoo! functionality available, though the feature is still technically listed as beta-quality.