Thanks for the many tips. Despite the sign in problems, using your technique of signing into Wherigo via Safari and going to the download page, then opening Pigo allowed me to download two nearby Wherigo caches!
Cheers!
Ditto problem. Hope Groundspeak fixes this soon. Having it on an iPhone will open up many, many more geocacherst to Wherigo.
I was so excited and was going out to find a Wherigo until the sign-in problem