Craftr: My latest million dollar idea

This morning, after a couple Google queries, I figured out how to add a LibraryThing widget to my sidebar. I've had a LibraryThing account since last November, but I haven't really done anything with it: the retrocon work is just overwhelming. So earlier today I added the three books I'm reading or listening to now, removed the dozen test titles I'd put in over the past year, and pasted the Javascript widget where I wanted it on the page. This might inspire me to keep working in LibraryThing.

It would be cool if there was something similar for knitting, some Web 2.0 community site that let crafters create accounts, record details about their projects, upload pictures, allow tagging and commenting. Simple RSS widgets could be dropped into blogs (automatically generating nifty percentage bars -- this whole idea occurred to me because I can't make this code work in Blogger Beta, and even if I could, the prospect of editing HTML code every time I want to update my "On the Needles" sidebar makes me want to scrap the whole thing). I see mash-up possibilities, with Flickr of course, but maybe even Etsy.

What do you all think, Gentle Readers? Could one "Craftr" (or "CraftThing") site cover the needs of knittrs, weavrs, spinnrs, etc.? Just the yarn crafts, or could it be expanded out to embrace quiltrs and beadrs? Maybe each separate craft would feature-creep it in too many directions? As a knittr, I think I'd want the project database to include pattern source, start and end dates, materials, and progress indicator. Notes and journal fields would be important, and specifics (like dye lots, gauges, needles, etc.) could be recorded there.