Luuti, it seems like you already on H1B since 1/07. Once the H1B start date kicks in your OPT expires eventough you have it until May. As far as going for visa stamping, you would need to make sure how good the work is. Are you getting enough salary listed on the H1B Petition? If you are working at American company in good standing, you should not have problem getting the visa from anywhere however if you are working for IT Consulting company and project is not yet assigned for you then i recommend you to go to Toronto - do not go to Calgary or Vancouver. If you work for Consulting company, then you would need to make to carry bunch of company related documentation addressed to Consulate. If working on the project, make sure to have a end client letter stating that you are currently a team member in the project working as whatever title designated for you on the H1b. This letter helps in great deal to get the visa. In case if you work for direct client on H1B then you would just need to get a employment letter addressing to US Consulate general. Make sure to carry 2006 W2 as well as 3-4 most current pay voucher along with you. visa is pretty much sure for those professional who has US degree and Job in US. Let us know when you go for the visa stammping and share the experiene for other users as well.