The guy who writes Rivatuner (goes by screen name Unwinder) was on vacation. Not kidding. His words.
He had originally said end of July and was waiting on card samples (I guess they didn't come before vacation started) but revised that in a forum post to say middle of August is the earliest we could expect a new version of Rivatuner that supports the 4800 series.
If you'd like the latest and most detailed information on Rivatuner, I suggest you check out Guru3D.com and their forums. They are the official site for Rivatuner and have a basic and advanced Rivatuner questions section along with guides for working with the program.
![[H]ard|Forum](/styles/hardforum/xenforo/logo_dark.png){kind=logo}