The Palm Pre WebOS is a Linux OS, the Palm SDK is free, and it works under Windows. If you visit precentral.net and visit the home-brew forum there are already more than a dozen Linux applications created for this device.
It may even be possible to easily implement a VOIP interface with the Pre as it is based on Linux. I believe listing an application with the Palm store isn't expensive, and it would help users of the Pre. Other cell phones may use a non-Linux OS, or a non-Linux SDK, for the Pre it's not only Linux, but also Windows friendly. I'd trust an application made by Ooma a thousand times more than a home-brew made by someone I don't know.
As the Ooma hub, and Ooma Telo seem to be slim Linux devices, development for the Palm Pre which is also a slim Linux device (with 24/7 internet access) shouldn't be a problem IMO.
I have the Palm Pre 2 unlocked on an unlimited ATT plan, and it just rocks. The only thing missing to make my cell phone experience complete is an Ooma app.
To the extent that you need beta testers, or need assistance in developing such a program (I have begun programming for the WebOS platform; so intuitive), I would love to help out.
Please let me know.
I doubt that they will be making a WebOS app for the Palm Pre soon, we don't have enough market share yet.
However, I did discover that if you just use your WebOS browser, the 'my ooma' page comes up nicely on a Palm Pre and looks just like a regular WebOS app.
Just 'bookmark' your MyOoma webpage.
You can do all the things you are requesting, I tested it out myself!
PS Here is what I'm bookmark to: