I started a thread like this recently but since you have such a nice list of links I think I'd like to put my links here instead and have one nice place for them all.
Two apps I had thought of were
Comixology: Windows 8 app available, worth mentioning
Online Form: Contact Us - Comics by comiXology
Twitter: https://twitter.com/cmxsupport Stumbleupon: Windows 8 app available, worth mentioning
Online Form: StumbleUpon | Email Us (must be a member)
Twitter: https://twitter.com/StumbleUponHelp
Another app from my past thread
Trillian: Online Form: Windows Phone 8 and "Metro" support... / Suggestions / Discussion Area - Trillian Support Twitter: https://twitter.com/trillianastra
I actually tweeted comixology and they said they're looking into it, and the tweet before mine was also requesting a windows phone app. They told him they had no word on that yet. hopefully some pressure will get us from no word to looking into it to downloadable.