I noticed the same thing just last night.
Yesterday morning I had my cards for time home and some random place in town but last night...nothing. If I ask something it loads forever but no search. Oddly tho it will put that query in my search history.
It says I am not able to opt into latitude. I am opted in.
I deleted and reflashed. Fixed permissions. Zipalign and repeated. I even reinstalled my nandroid backup from when it worked...nada.
OK now I'm sure what it is.
Google made a mandatory version bump on their servers relating ALL voice search services rendering anything pre 3.x.xxxx unable to work.
This now means that unless this hack/application gets updated to a newer/latest version from the market it won't work and there's no workaround that (common google search functions still work but you don't need Google Now for that).