Another lesson will be released, probably around next Friday. Anyway, I'll use this opportunity to announce that I will be on vacation for a week from next Saturday onwards. I'll go to Amsterdam and I can't tell yet whether I will have computer access there. Therefore, I probably will not be able to answer questions or to help you out unfortunately. However, once I get back I will have another week of vacation in which I'll be able to give advice. Lesson 3 and the upcoming fourth lesson will stay open until I return at least so you don't have to worry about not being able to finish it in time. I hope that's okay with everyone.
Secondly, in order to prepare my final lesson, I would love to get a few suggestions or feedback on what you'd like to learn. I'll do my best to teach you whatever I know about the GIMP but such a program is very complex and it's impossible to explain and describe everything. Therefore, don't be afraid to experiment around and to ask me if you have any questions or need help.
Cheers.