No, it was another company, I don't think a well-known name.
Opera Mini still works today on S60 phones from 2006ish. I regularly see web server log entries from a relative on my private server. But I believe it's a native Symbian app (.sis) not a Midlet. (I have working phones, but I don't have Opera Mini, so I cannot verify)
Reqwireless I have certainly heard. Don't remember in which context. If you tell me they had this "browser frontend" midlet, it's probably the one I used. 2002ish I would guess.
Opera Mini still works today on S60 phones from 2006ish. I regularly see web server log entries from a relative on my private server. But I believe it's a native Symbian app (.sis) not a Midlet. (I have working phones, but I don't have Opera Mini, so I cannot verify)