I was laid off from my company on Dec 11 2008. I am currently on H1 visa. My company did not inform USCIS until after Dec 15 2008 (though I am not completely aware of the exact date). How much time do I have before another company can file for my H1B transfer?

-Also my wife got her L1 visa and will be coming here this weekend. Can I transfer over to an L2 visa?
- Do I need to leave the country or can I apply for the visa staying in the US itself?
-Does her company have to sponsor my L2 visa, or can I apply individually?
-Also can I apply for EAD along with the L2 visa application or do I have to wait until I get approval?