ICS like search widget?

Not on the default launcher, but GO laucher EX has theming, and there is a free theme called ICS PRO that offers an ICS type google search widget theme.

 

Haven't tested it, but this looks like it may be what you're after -

https://market.android.com/tiwiz widget icsbar

 

If you're using GO launcher, get the GO Google search widget, and then get the Go Widget Transparent theme.

 

try this one, i love it ICS Search Bar 1 for GO Widget