I pulled Bitcoin QT into the master branch of https://github.com/bitcoin/bitcoin/ this morning.
See doc/readme-qt.rst for instructions on building Bitcoin QT.
And I updated doc/build-*.txt; they are now instructions for building bitcoind and don't mention wxwidgets at all.
There are still loose ends to tie up, like modifying the build scripts and the windows installer; I hope to tie those up in the next week or so, and have a release candidate for a version 0.5 available soon.