Slightly off-topic, kinda' related. Do you know any resources for "current" recommended encoding settings (with regard to US-based ISP speeds & typical consume

Slightly off-topic, kinda' related. Do you know any resources for "current" recommended encoding settings (with regard to US-based ISP speeds & typical consumer home networks - dsl, cable, fios, cellular, 802.11g/n etc.)? I know Flash Media Server will stream .mp4 h.264 video to Flash 9 and greater. iPhone/Ipod Touch requires a maximum encoding setting of Baseline, Level 3.0, iPad Level 3.1. I really want to know what bitrates at which speeds and resolutions. Depending on the user's connection, how many different bitrates would the video be encoded for (iPad over 3G, ipad over 802.11g, ipad over 802.11n, with cable, dsl, or fios)?