i just tested the new bt4beta and tried to user airodump with my sitecom wlan wl-110i pci card (PCI\VEN_1260&DEV_3890&SUBSYS_001417CF). I was able to bring it in monitor with airodump-ng start wlan0 but airodump-ng cant find any networks on mon0 and wlan0.
My card worked on bt3 and uses the prism54 chipset.
Hope this card gets supported in official release

Thanks in advance