Turns out you can use an "iframe" tag in your description - which then bypasses Lulu's limits in their database.
Their code was something like this:
frameborder="0" height="1020" scrolling="no" width="90%"
Neat, huh? It just redirected Lulu to go to your own website to pull in data. And no, Lulu doesn't mention this. Means you can have all sorts of code within that iframe (like an opt-in form).
They also support the "embed" element as well, meaning you can put a video into your description.
Means we can get proper descriptions into Lulu, finally.