It looks like there's a typo in the rails app product model (which would explain why updates don't propagate until the 5 minute poll interval expires).
Rails logs ("lamdba" should be "lambda"):
[2013-01-22 18:39:05] WARN Could not determine content-length of response body.
Set content-length of the response or set Response#chunked = true
Product: rhoconnect_destroy returned unexpected error: undefined method `lamdba'
Which results in the following RhoConnect logs:
[06:38:12 PM 2013-01-22] Use of the POST /application is deprecated. Use Rhoconn
ect API v1 instead.
[06:38:13 PM 2013-01-22] SourceAdapter raised delete exception: 500 Internal Ser
You're the man - Lars!
I can kick myself silly for that typo... I appologize for not seeing it before crying wolf, although I did spend a day staring at it.
Your explanation of the issue has helped me better understand the inner workings hence knowing what to look for and where to go when something goes wrong.