[Ceefaxer]

...and then create a widget displaying these nodes...

You mean one widget per (one) child node?

Not really. You create a parent node called say genres and then create a variety of child nodes in that for each genre, you can then make one widget to look at the parent node and it lists the child genre nodes inside, and they work just fine, no loading time wait. Obviously its a ball ache to create, but I only use genres for audiobooks/radio/podcasts so the genre types are always going to be limited to around 10 or so. Its a fudge but I cant stand that loading time.