Group / Ungroup is on my list of updates. Several customers have been asking for that. By Web Services I'm guessing it's the selection of the Sonos device instead of the hard coded drop down? Then that is in the next update of the sample scenes. If it's a web service for all the Sonos browsing then that's a bit of a challenge.
Yes, but please understand that I need to reverse engineer the process as there is no Sonos protocol. Reverse engineering can take hours, days or weeks depending on the complexity. I worked on the original Sonos driver over a period of three months before I finally got the basics working. It will get done.