If you have an artistic streak you might want to consider making your own flash banners, they are quite easy to do with the aid of the many different flash programs available. Even if you are not normally that way inclined it can be quite nice to be involved in making something yourself, especially when it can go on to produce a nice commission for your website. Generally speaking it takes only an hour or so of work to produce Flash banners depending on how complex the design is of course and whether or not you include some audio, video or just decide to stick with normal animation. Many of the best graphic programs can assist in the design of good looking Flash banners, however if your budget doesnt allow you to use one of these then there are some great free alternative programs that can be found on the internet.