Both handsets are being touted as heading for a March release on T-Mobile according to several sites.
The Bravo is basically a Nexus one with an optical joystick instead of the trackball and has physical buttons rather than the Nexus ones soft keys. It will also pack the HTC Sense UI that we all know (and love), it should also come with Android 2.1.
Best of all, it is rumoured to be free on a £35 a month contract.
The Sony Ericsson X10 is also rumoured to be officially available during March, again on T-Mobile ( hopefully on a similar contract for free)
This powerhouse of a phone could well become the highest specified Android phone available, running the same 1gh Snapdragon Cpu but with an 8mp camera and 4" screen.
( With thanks to Android release and htcsource )