Some potential good news for those of you on Orange FR and who want to tether: evidently they have the billing plan now in place to charge you to use your Windows Phone as a modem/tethering. Users are being sent a text message that states (translated)
"Service Modem Orange Let's Go is available. Using his mobile as a gateway connection. From € 8 per month for the 200MB option."
Of course Orange France was noted earlier as either disabling this option initially with the Mango update, or perhaps like others, the OEMs just did not have the drivers ready. What this means, assuming it's not a mistake (and it could be just a general message sent to all phones), is that those on Orange should also expect a firmware update to their phone sometime to enable this much desired feature.
We're keeping our fingers crossed.
Source: Mon Windows Phone