I'm running Beta3 of the Parallels Software. I've installed Solaris 10 01/06 and got the graphics / keyboard and mouse working. You can see a screenshot at
http://www.flickr.com/photos/62281904@N00/
I used the following commands :
/usr/X11/bin/xorgconfig
and then the following entries (the --> denotes my comments - don't type these
[ENTER]
5 --> PS/2 Mouse
Y --> emulate 3 button mouse
[ENTER] --> default for /dev/kdmouse
7 --> Generic 104-Key PC
87 --> UK Keyboard
[ENTER] --> for keyboard variant
n --> additional XKB options
[ENTER]
6 --> Non-interlaced SVGA 1024x768
2 --> 50-90 vertical sync rate
apple20 --> identifier for your monitor
y --> yes, you would like to look at the card database
0 --> Generic Vesa compatible option
[ENTER] --> to continue
5 --> 4096K of memory
ati1600 --> identifier for you graphics card
4 --> the modes are ok
4 --> 16 bits
then say Y to write to /etc/X11.conf
Then you should only have to logout and login again for the new settings to take effect (although with all the experimentation I've done, I may have had to reboot).
I tried various combinations, I don't think I got 24 bit colour to work and I haven't tried higher resolutions as yes, but this works for me.
I also haven't got networking working ! It plumbs in the ni0 interface but doesn't get the ip address from my dhcp server (Belkin wireless router).
I also had problems with some Solaris Express builds which wouldn't install (but I had the same issues on my Toshiba laptop as well - problem is documented at :
http://www.opensolaris.org/jive/forum.jspa?forumID=31
the message is titled "X.cpio.bz2 : Odd Problem with various versions"
It took about 40 minutes to install from the ISO image stored on the disk (I didn't use a physical DVD image).
I going to try to create a flash archive from a later Solaris Express build and see if that works as I want to experiment with ZFS and also get Linux containers running under Brandz.
Hope this helps
Richard