I figure at this point everyone that hasn't gotten root yet need as many tips as possible and will try just about anything, so here is another tip... I've gotten into ADB 3 times(initial root, remove apps & install WirelessN), and each of them was on my first try after rebooting my computer. I'm using the pny sd card(for me it's the 4gb class 4 but 2gb works great as well), which seems to have been by far the most successful card, also I have SDK installed as my driver. The method I used was pretty standard, no clicking in & out the sd card, I just left it in the whole time, I didn't even use loop.bat. I know it's annoying to restart your computer after each attempt, but it worked for me.