animated banners

What software, websites and/or tools do you use for creating animated banners? I'm currently using The Gimp, but even with plugins it's really inconvenient and time consuming. Is something out there, that's useful for creating lots and lots of banners with light variations? Possibly for...

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We are looking for animated banner design for our livechat.zone cam site. we need high end design. banner dimensions are 300x250, 728x90, 120x600, 160x600 we need 40 or more! for a huge advertising campaign. please get in touch via skype ID livechat.zone all designers who read this dont...