Is this dear having external USB port for charging? Nice! Just don't try to get into plane, with it. I'm glad you found suggestions of cable placement useful. By using more thin, or special flat cables, you could even fit the whole "wireness" inside N900's case, without anything looking suspicious from outside (while still using "regular" port for charging). Unless you're after cyberpunk look and don'r care about airplane security,in which case I'm with you

/Estel