in games produced by big companies you have the logo of the developer team, the logo of the publisher, often the nvidia logo (if physx are used), a logo of the engine (i don't promise that the order is right^^) ... even the rpg-maker has them
anyway .. does it hurt you if you show a logo of the engine for a few seconds?
it will help the developers of our engine so imho nothing speaks against showing it

btw i've just made a good looking logo and am currently working on the animation (...stupid perfectionism i cant let it be as it is until its be best i can do^^")
you can find it here: User Recources / A8 Logo (and sorry for the self-advertising, hope you can excuse this^^)