[all] usb headset connector?

[arne anka]

ok, if i understand correctly, all of _these_ adapters[1] work by using  
additional pins not specified in the usb standard, ie not by some driver  
magic that sends sound via the standard pins, right?

[1] not just the cingular one, but also
> http://www.amazon.com/3-5mm-Stereo-Adapter-T-Mobile-Diamond/dp/B0011WDLES/ref=pd_sbs_a_2_img/184-2544850-3162110
or
> http://www.amazon.com/OEM-Converter-Cingular-T-Mobile-Cavalier/dp/B001RXTDP2/ref=pd_cp_e_1_img/184-2544850-3162110?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-41&pf_rd_r=03ZX1CK3AZE3RG0W2AVJ&pf_rd_t=201&pf_rd_p=413863501&pf_rd_i=B000UHY6XU