I finally got this issue resolved and I can now login to adobe.com, Creative and Kuler. I tried many things, but this seems to be what worked. I did a "forgot my password" on the creative.adobe.com site, rather than the adobe.com site. After I reset my password, I still couldn't login, but when I DID NOT check the "remember me" box, I got logged in. The next time I logged in, I did check the "remember me" box and I still got in. But even though I checked the "remember me", it still remembers the previous password, not the one I just set. Seems like a bug in the "remember me" option. I did the obvious thing of deleting adobe cookies, browser cache, etc.
I'm on a Win7 PC with Firefox, but got the same results on Linux and Firefox, and IE on Win7.
Thanks a lot to David__B for working with me on this.