Edit: I just tried, but BtS stops at "Init Engine" during startup with a "Invalid 3D device type". I tested some OpenGL apps that work well, with hardware accelerated graphics with reasonable framerates.
Operating System: Windows XP Professional (5.1, Build 2600) Service Pack 2 (2600.xpsp_sp2_qfe.080814-1242)
System Manufacturer: innotek GmbH
System Model: VirtualBox
BIOS: Default System BIOS
Processor: AMD Phenom(tm) II X4 920 Processor, MMX, 3DNow, ~2.8GHz
Memory: 1024MB RAM
Page File: 217MB used, 708MB available
Windows Dir: C:\WINDOWS
DirectX Version: DirectX 9.0c (4.09.0000.0904)