Another thought--don't lose

I've found it best to get it out of my mind and on to paper (or web) as quickly as possible. There's too much going on and too great a risk of having a thought driven from my mind (like Butterbur the inn keeper in Tolkien's Lord of the Rings). Anyway, the thought: what would it take to imbed an IM or chat feature on my web site? Wilson Reference has chat, and we have IM using Meebo to communicate between the main reading room and our workstations. So, what would it take?