Keeping in mind that I do not know all the super secret stuff that goes on in the development cave but I have not heard any word for a V6 of The Logo Creator. However people showing their interest and talking about the things they would like to see in future versions is what sparks the motivation for new version releases. Really cool to read your excitement about it!
I for one would like to see a new version of the web graphics creator. Specifically I think the ebook cover creator should be broken back out as it's own product and enhanced. It has great potential but there several things it could do better. I will probably create a seperate thread as a wish list but that's just my 2 cents..