Things like that happen to me too, but what I do is develop the ideas as much as I can because I know that I won't be doing it later. I just write a lot and then it's available to read. I don't read much of my previous ideas, but when I do, I like them. :)

And that would be cool indeed, but since most of my brainstorms are on physical notebooks, I'd have to scan them and upload them to a server. I'll think about it but it sounds like a lot of work O.O (so probably not doing it :D)