On what Blix has found: you appear to be under the impression, as are many other people, that the process of inspections is supposed to actively find and remove weapons from Iraq.
What the inspectors are actually supposed to do is to *confirm* Hussein's disarmnament.
It's OK, I didn't understand that either -- until Blix's first report, where he confirmed that as of that point Hussein was not disarming. His critical point, during that first report, was explaining that the Iraqis were supposed to cooperate by showing them evidence of the VX gas they had disposed of, taking them to the incinerator they used, showing them the records of how their anthrax deposits were killed, talking to the scientists who oversaw that, etc.
Blix noted that, when South Africa decided to disarm themselves of their nuclear program, they invited the inspectors in and documented it all, meticulously and completely. They proved to the world that they had done it.
Then Blix said that Hussein is not complying that way.
Blix's inspections are not designed to be a game of hide -n- seek where if they don't find anything Iraq "wins". They aren't enforced inspections. For a few days France considered proposing putting UN troops in Iraq to actually do real, enforced inspections. But they didn't go anywhere with that idea, because they knew it wouldn't work anyway; the moment an inspector asks to enter one of the presidential palaces with the threat of force, that ruse would end, and probably painfully.
Anyway, it looks like Saddam might insist on keeping his "disallowed" longer-range missiles despite them having being "found" by the inspectors.
What Blix found as of Jan 28
Full text of Powell speech