kancho mentioned above that

"If you do go to Nepal or anywhere out of the US(except Canada/Mexico returning within 30 days), you'd need to have your PP stamped with the H1B visa though"

I am currently in US in H1B visa(visa expired). I am going to canada to get my PR (permanent residency). I am planning to come back within 2 weeks. I also saw this in http://murthyforum.atinfopop.com/4/OpenTopic?a=tpc&s=1024039761&f=4724019812&m=7261020931.

The notice from USCIS pasted in the murthyform says that the nonimmigrant alien much be in possession of a Form I-94. I believe we have to submit our I-94 while going out of the country. So how will we be in the possession of the I-94 when coming back.