Best way to implement a kind of hi-score data (update and restore data on a server) - OpenFeint or http/php?

I want to implement a simple mechanism which stores simple data on the net - so that the player will be able to compare his score to others.
I don’t want to display it using a hi-score table, but rather using a graph / diagram.

What I need is the ability to save, update and restore data on a dedicated server.

From what I’ve read, it is possible to do it using OpenFeint (blob data).
The problem is that OpenFeint is in alpha stage, and is not supported on Android…

Is it possible to implement it using the network capabilities of Corona / Lua?
Is it reliable?

What would be the best way to implement such a feature in my game?

Appreciate any suggestions and sample code,
Thanks,
EZ [import]uid: 9536 topic_id: 3204 reply_id: 303204[/import]