:sl:
I hope I'm not out of line here in saying that I really don't think this is a good idea. I will list my reasons, if I may:
1) Many of us are familiar with the image the word khatam tends to conjure up, the gathering together of people after a death to read Qur'an to complete a khatam or khatams. This practice, is a bid3ah. Once people get used to doing a khatam in the manner described for the thread, then any other type of khatam with multiple participants will not seem so bad, and this has the potential to increase it's acceptability in people's eyes.
2) Is there any evidence that the Sahaabah (may Allah be pleased with them) used to count Quran completions with multiple participants like that? e.g. "I've read this much, you've read that much, so between us we have completed a Qur'an."
3) You aim to complete one khatam every two weeks. But believe me, there will be many khatams going on daily all over the world that we don't even know about. E.g. if you read only Surah Ikhlaas today, and someone you don't know in Africa has read 5 ayaat of another surah etc, around the world, many other people will have read many other portions of the Qur'an on any given day, and there are probably hundreds of khatams going on daily, that only Allah knows about, if indeed He keeps counts of khatams in that manner.
I think a thread in which people (without aiming for a khatam) can post if they wish to what portion they have recited in a day is fine, though many may not, so as to not broadcast their good deeds.
May Allah enlighten our hearts and lives by the Quran and enter us all into Jannah by the Quran.
Ameen.
And Allah knows best, and may He forgive me if I have said anything wrong.
:sl: