While we keep working on adding new features to SkyScarf if you think there’s a nice search engine missing in the list, just post it at the comments or send us an e-mail and we will review it. If it is approved (will mostly do) we will publish it and make it visible to everyone plus give you credit on it.
Oh, and we are also open for new ideas or ways of improving SkyScarf. Every good piece of feedback is appreciated and in some cases rewarded!