The premise is pretty simple, just follow a user "glu" on Twitter then to take notes send a direct message to glu. The system then stores the note permanently, i.e, "d glu dicount socks 1-800-555-SOCK". You can then search notes by sending a direct message to glu with a ? as the first character. For example "d glu ? discount socks" would return all your notes that matched "discount socks" as direct messages (actually at the moment it returns the best match and a link to all other matches).
It was originally just for me but I've opened it up to anyone. I'd love to get some feedback on what people think, where there might be improvements, what's missing, that kind of thing. Any feedback is greatly appreciated.