h1b-->mexico work permit-->tourist visa for US

[mexus]

My 6th year of h1 is expiring in April 2013 and my company is sending me to mexico for time capture. I will be working from Mexico.
Can I come to US as tourist for some time on vacation from Mexico? How feasible is this?

My GC processing is in progress and PERM will be getting filed in May 2013.

Also, I have enrolled in DV-2014 for GC lottery