It's looking doubtful it'll be released in July. Normally, there would already be supply chain information at least a month before actual release.
In fact, it's looking doubtful the Within or other SGSII will be released in the US. If you check the news the last 2-3 days, there have been many articles stating that either negotiations between the carriers and Samsung are still ongoing or that they've already ended without a contract to bring the phones to the US. Samsung phones are always delivered to the US first before releasing in Canada due to the way Samsung has always prioritized in their NA distributions. It's the same with TVs, Home appliances, etc... I don't think I've ever seen a Samsung Product released in Canada first before the US. That's why it's sort of ominous that Canada has their SGS2 release, but we don't yet.