I think the Citi Platinum Amex is one of the best offers out there right now. Check out the thread on it.

Most business cards do not show up on your credit report. I'm using this feature to play the 0% balance transfer game. I've taken about $40K on business cards which is earning 5.3% in a nice safe money market account. It is not hurting my utilization as it does not show on my report, but as you say, the inquiries do.

There are exceptions, like the Citi Professional, that does show on your credit report.