I havn't had full-on food poisoning yet... but I'm sure its gonna happen eventually. I'm not exactly 'picky' about what I ingest...
I have however managed campylobacter, and mesintericadenitis (sp?).
The latter is like tonsilitis, but for your abdomen lining. It involves throwing up every half hour for a couple of days. If you recall what its like to (attempt to) throw up with nothing in your stomach, you know it quite awesomely painful, particularly after the twelfth or so time.
Mmmmm.
And hey, if the toilet-brush water helped, then good on you
You could publish a self-help book: "Clavus' Unlikely Cures 101"