W will address the space vision again soon...
...according to this UPI article by Frank Sietzen.

The speech apparently will be timed to coincide with a report by the presidential commission appointed earlier this year to review the space plan and seek broad public comment. The commission, headed by former Pentagon executive Pete Aldridge and featuring leaders from industry, non-profit groups and the military, is expected to release its report in July.

Sources said Bush has been briefed on the hearings held by the commission and is awaiting its report to help frame his forthcoming remarks. Despite the approaching presidential election, the speech, which will reiterate Bush's call for advanced human exploration of space, will not necessarily be made "in a political context."