The Collections Agent is available now from Kobo. (You can also purchase it from Inktera, iBooks or Nook.com. Or read it via Scribd.) If you like it (or if you hate it) you can always rate it or leave a review over at Goodreads.
Kobo. (It will also be available from Inktera, iBooks or Nook.com, and Scribd, once the files are approved.)
You can look for individual editions of Insomnia and Happy After All to be released in a month or so. I am planning a single volume collection (that would also include things too short to make good individual ebooks and possibly a few unpublished things), but I have no specific timeline on that release.
In the meantime, I'm writing writing writing in between being busybusybusy. As usual.