Hi everyone.
I've found one interesting javascript tool for adding reflections to images.
http://cow.neondragon.net/stuff/reflection/

It works really cool as for me. I'm not going to tell you a lot about it, just visit project's homepage for detailed examples and here are some previews of this script with my photos.

UPD: As soon as Drupal 5 and 6 already uses jQuery in its core I was wondering if there's the same plugin but written for jQuery and you know... it really exists. Here you go:
http://www.digitalia.be/software/reflectionjs-for-jquery
If you use it instead of the above one - you will save 3kb of your space additionally and will be able to work with it like with standard jQuery object. Cool!