I finally got around to installing mine today. I can confirm that the bolts are M8x50MMx1.50 thread. I got four of flange bolts from Lowes for $3.62/pr.
As for the install...as mentioned previously...it'* straightforward. Just used a 15mm socket for the strut bolts and a 12mm socket for the bolts. I ended up pulling up on the right bracket after I installed it so the bar would clear the alternator. I now have about 1/4" clearance over the alternator. I also pulled up the the left bracket to make it symetrical.
I also put a little bit of blue threadlocker on the bolts. That'* just me.
As for the test drive, it seemed to actually make a difference. The steering felt more solid and the car felt alittle more confident on the off ramps.
5/26/06 EDIT: I also recommend gettting longer strut tower bolts to compensate for the bracket thickness. Get 6 M10X20mm X1.50 thread (Grade 10.9). I got six of them from Lowes.