why don't u add a pop-up for the building ideas? it can be really nice. and they can be tagged for a simpler search
I will looking tagging inside content with # options like #buildidea if searched in search could show all posts... will update once i look into it more.
We now have a tagging system for threads on the server, you can put tags on your post (only original poster can) along with put tags in content with # for existing tags. The top 25 tags show at the bottom of the site. Moderators can edit and remove tags on any post