Something I found recently when trying to get a 'consistent' CM9 look across my lockscreen and homescreen that you can apply a transparent png as your lockscreen wallpaper and it will 'show through' to your home screen wallpaper.
Try this as a wallpaper along with my 'mashup' (thanks to wajk) ICS theme or with any other theme, disable wallpaper scrolling using Andy's Extended Settings and get that CM9 feel on your MIUI
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