Following a brief email chat with Grazr's Adam [original chunk of post got deleted during maintenance:-(]
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Here's a technique for generating a Grazr UI to a yahoo search pipe that accepts a single user text input.
Foe example, the following was generated automatically by posting a Yahoo pipes RSS URL into the Grazr UI generator:
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If I get a chance, I'll see if I can knock up a bookmarklet/GM script to automatically add a 'Grazr UI for this Pipe' link to appropriate Pipe run pages...
...or maybe the Pipes team will reveal their UI solution? (I wonder, are there any generic/easily customisable widgets out there that do this already?)
You can find the Grazr interface generator here.