I am very new to Roomie myself, but I thought I would chime in here and let you know my experience thus far. I have had Roomie up and running for about a week now; and I have to say I am VERY impressed so far. Like you, I am longtime Vera user. I have used SQRemote as a hardware beta tester and I continued to use it after the beta testing period.
In regards to your two questions above, I think I can answer them from a user perspective.
#1) Yes, Roomie does call Vera scenes using the “Scene Number”. You have to get the scene number from Vera’s web GUI.
#2) As Roomie responded above, yes you can. I’m not sure if you are more interested in delayed commands in Vera, or IR/Serial/IP commands (for AV devices) or not; but yes, I believed these are all possible.
I looked at, purchased, and attempted to configure iRule before diving into Roomie and I have to say I am not disappointed. While I have absolutely no doubt iRule is a great product; I am looking for something I can configure more quickly with less of a learning curve and Roomie has been just that for me thus far.
As far as tips from a noob, I would highly recommend comparing your equipment with the compatibility sections of this website. Verify your equipment is compatible, and more importantly, what are the gotchas for each type of control (IP vs IR vs Serial). I think I have relied on IR control of my equipment too much initially. While I have been able to get my RoomieRemote up and running relatively flawlessly; I think I should have explored using other control means [such as serial for my Denon receiver and IP control for my Samsung Plasma (with CEC for initial waking)] over an exclusive IR (via iTach IP2IR) strategy. Also, I can really recommend this companies products so far. I think the time that I really sat back and said “wow, this is a great product” was when I decided to fire up VPN on my iOS device (outside of my network) and then launch Roomie, just to see if I could control my system remotely without punching holes in firewall etc and IT JUST WORKED! From the zero reconfiguration VPN remote access, to it’s ability to recognize when a device’s IP has changed (and notifies you of it); this truly is the best AV control iOS app I have ever used.
I hope this helps you in your buying decision! - Jake