I know there is a website PHP script that makes iCumulus, but that interface takes a while to load if your on an EDGE connection. (which I'm on 24/7 because AT&T doesn't cover this area with 3G) I would think that it would be faster to load mainly because it could possibly gather data from the realtime.txt file. Though, I do realize that those who don't own the Cumulus station they would be trying to access most likely have no clue where the realtime.txt file is--because some webmasters place it somewhere else. -.-' So, that would be a bit of a problem. iCumulus covers this issue because the webmaster configures that. I'm sure there's a way to get around that, but it would be a trial-and-error case.
Anyhow, it's just an idea (or possible a basis) for making an iApp for Cumulus. I would create one, but I don't have OS X anymore to get the iPhone SDK and code it.
