I think this is a good start. The colors can be worked out further towards the end although I would say that muted colors schemes like #8 do not appeal to me.
I do think you are on the right track as far as the logo is concerned. I would like to see the form/F image fleshed out some more. Curious how it might be directly integrated into the name itself and made more clear. However, it does embody simplicity along with style. If I can find one that by itself is more square than rectangular (your currently would fit inside a wide rectangle), I could utilize just that mark - apart for the logo - through out a page or sitewide. So it has promise.
Try experimenting with different type faces as well.
I'm bumping #14 and #15. I think keying on the F in forms.com is great. So in order to emphasize it, the letter should not be too artsy as to minimize it looking like an F. I'm putting in the discard section, but if I am overrules by other that I am having look at this, then it might resurrect. Are you trying to take the form shaped F and twist and turn it in such a way as to replace the F in Forms.com and still keep the essense of what you have started? I would be curious if it would work. Let me know.
Re:#12 Are you going to submit new concepts based on #12 or is this it? You had indicated that you were going to work on this over the weekend and upload... time is running out. I really would like to see. Hope you make it.