I recently purchased a Canon Speedlight 430EX II, and have been experimenting with the flash on my camera. I have also ordered a 6 foot off-camera flash cable and a bracket that will allow me to move the flash off camera and get some angle to the additional lighting. In my experimentation I've found that the flash really does produce very white light with a slight bluish tinge. This doesn't really work all that well for many of the shots I've experimented with, nor for some of the indoor photography I'll be doing for a customer soon here.
I'd like to experiment with gels for warming and cooling color, however I'm not really sure where to start. I noticed that there are a few cheap Strobist sample kits and starter kits, but many of the comments state that those gels are too thin for most Speedlights and leave a strip above and/or below the gel of unfiltered flash light. Are there any reasonably priced gel kits with both warming and cooling gels that are recommended for a beginner?