Looking at Browning's website tonight. Notice they are showing the X-bolt Hunter in a huge variety of chamberings.
However, a check of Gunbroker failed to find any that were actually out there for sale.
Have these just not hit the streets yet? or ???

I have seen them available before. I checked a couple sites just now. All I saw were LH ABolts in WSMs.

There are several X-Bolts on gunbroker but for some reason, gets missed on specific searches. You might search for left hand browning and see if that helps.

LH X Bolts are now in stock at three of my distributors. How many do you want?

Alan,
Have you handled one? They look fairly swoopy.

They have a Euro look, but are ergonomic. I especially like the small diameter grip. I don't own one myself as I don't have many gaps unfilled.

I will likely pick one up early 2012.