SMF Arcade 2.5 RC2 has been released. It supports for 2.0.1.
Changelog | Download
Also site was upgraded to 2.0.1 and SMF Arcade 2.5 RC2.
Also if you registered and didn't get email, it should be fixed.
SMF Arcade development will be soon moved to Github (my other mods will follow).
This is simply because I'm trying to get others more involved in this project. (I haven't had much time/interest to work on arcade lately).
This applies only to 2.5 and 2.6. 2.0 won't be moved.
It is time for me to step down as admin and let someone else take the reigns. I've been admin here for 4 years or so and it's been quite a ride. But it's taking too much of my time to keep up with the many things that need to be done here.
I'm not leaving SMF nor SMF Arcade. I'll still be a beta tester and will help with documentation. Actually, I'll be doing documentation for other SMF and non-SMF mods as well. This will free up my time to pursue this and work on other projects that I am involved in. 
I'd like to that those who have stuck by me and this site:
Fwitt
Jeza
Underdog
Deathsign
noex
wmd2005
DarkNico
lurk
ozzie
And any users who have tried to help other users.
Their trust, loyalty and friendship have helped to make things much, much easier! 
What's going to happen to SMF Arcade? I have no idea. I guess only Niko can answer that.