My dealer came by today in upgrade the STB list of my BV7-40mkIII; unfortunately he was unable to get the appletv to work, but when he had left I did some testing myself. Luckily I have a Lintronic device, so with codelearn I looked at the codes that were transmitted.
So, eventually setup that works for me:
SW version menu says: 05.02b for STB TABLE
AppleTV is connected to AV3 via HDMI
I've put the source under the V.MEM button (PC works to, but V.MEM is quicker on the BEO4)
Selected STB and then "iPod Remote" from the STB list (by the way "Apple Appleremote" does not work; the Lintronic device can't then even decode the IR as NEC codes, which the appleremote is normally sending; "iPod Dock" can be decoded, but doesn't work)
The BEO4 control works with up/down/left/right, Go, Exit, Stop.
And the good news: even fast scroll works !!!!!