Yay for Science!

[Epsilon]

so how long till

1: we find a way to tap it for power and

2: we find a way to weaponise it?

1: Tapping it for power will do absolutely no good unless we break the conservation of baryon/leptons. For every antimatter particle we create we must create a matter particle which requires just as much energy as we would get out of an matter/antimatter annihilation. In effect we have to provide E to get m so that you can convert m back into E. This means that, at best, you will get back exactly as much energy as you put into the process of creating the stuff in the first place. However, that is at best. The mechanics are not going to be 100% efficient for a variety of reasons and thus antimatter power is, at this time, a pipe dream.
Now, there is a way to break the conservation laws, because for some reason our universe is made up of matter when all current theories say that it should have mutually annihilated itself out of existence before the Big Bang even got a chance to start. However, for some reason we lost a whole lot of antimatter without it mutually annihilating. But even if we do figure out how that worked it would mean we were creating matter, since antimatter appears to be the stuff that goes away.
2: When Tom Hanks and company were filming the sequel to Davinci Code (the one with the magical Catholic antimatter bomb) they went to Cern to find out more about how to stuff worked. They were shown a containment bottle for antimatter. When asked what they do when they want to get rid of it the scientists said they just turn off the power. When asked how dangerous it was they said the power in the bottle was about enough to light a bulb for a fraction of a second. When asked how they could weaponise it the Cern scientists thought for a bit and then said that if you somehow could store the antimatter indefinitely it would only take running the collider for a thousand years and the entire energy output of the United States to create an explosion as power as a fission bomb.
So in short:
1 & 2: A very long time, if ever.
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Epsilon