[Qt-interest] Licensing

[Jan]

>> You must purchase a Qt Commercial Developer License from us or from one
>> of our authorized resellers before you start developing commercial
>> software.

Sorry, this might be a little bit OT: But what exactly is "commercial" 
software here? Am I not allowed to sell a software I build with LGPL'd Qt?
I thought I could even sell a GPL software (if someone would pay).

*confused*

Jan