Here are my sources...
How long will it take to be implemented? I hope that this system will work when the new bitcointalk forum has been launched. Sending PM thru theymos and Cyrus really eats a lot of time.
I couldn't find the post. But I'll try better tomorrow.
IIRC, the PM was from ~1 month ago and theymos said that he would try to code it in a few weeks. So it should be out soon. So it will definitely be available in the current forum software (SMF), and not only when the new software comes out.
The problem with the current system is that there is too many PM's and just theymos and Cyrus to check, verify the messages, deal with the members and recover the accounts. And they probably have a lot to do other than spend their day recovering hacked/lost accounts.
Give me a few minutes and I will find the PM someone received from theymos where he says that he is developing a system to automatically prove you own an account with your staked address.
IIRC, the PM was from ~1 month ago and theymos said that he would try to code it in a few weeks. So it should be out soon. So it will definitely be available in the current forum software (SMF), and not only when the new software comes out.
You realize a number of eye balls are looking at you now?(!) 
Just to help and post the reference "TryNinja" was looking for (in case he/she had difficulty in finding it):
If you have not posted that addy elsewhere, it probably won't be accepted.
We don't actually accept the profile field address unless there's some sort of proof that it's remained unchanged, for that very reason.
I'm working on a new address-staking system which will automatically handle signatures, etc. Might have it ready by the end of the month if nothing else comes up to consume my time.