I'm sure I've HW acceleration on all the tests:

Failed to initialize GEM.  Falling back to classic.
direct rendering: Yes
OpenGL renderer string: Mesa DRI Intel(R) 945GM 20080716 x86/MMX/SSE2

and

r...@migo-vaio:~/# glxgears 
Failed to initialize GEM.  Falling back to classic.
293 frames in 5.0 seconds = 58.540 FPS
299 frames in 5.0 seconds = 59.647 FPS
298 frames in 5.0 seconds = 59.444 FPS


it is list form 2.6.27 kernel therefore is GEM disabled.

With update to mesa 7.3 and other dependent packages from edgers
repository I'm down to ~50 FPS in glxgears (from ~300).

Under 2.6.28 is GEM enabled and HW accel. is ON but 3D performance is
same low and compiz is useles. For example, connecting to remote desktop
(terminal server client) uses 50% CPU time nonstop.

With 2.6.27 kernel is GEM disabled, 3D performance is horrible
(according glxgears), but desktop performance is OK, as used to be
before my experiments with edgers repository and GEM.

-- 
[i945] 2.5.1 driver poor performance
https://bugs.launchpad.net/bugs/303011
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