I'm actually really loving Pokemon Y so far! I'm not even at the second gym yet, but...oh well!
I haven't gotten to the point at which one can transfer the DS Pokemon to X/Y yet.
However, if it's like Black/White (1&2) it will be able to get done with two DS's and the DS Wireless Play will take care of it for you.
Pokerus still exists. It's awesome when your Pokemon gets it 'cuz its stats go up a lot faster.
However, it's largely unnecessary in X/Y in my opinion, since with Super Training you can boost the EVs pretty much whenever you want.
Pokemon from Black/White and Black 2/White 2 can only be transferred with Poke Transporter, which is an app that isn't available until December. It's a part of Poke Bank, which is a cloud storage for all your Pokemon. From what I read, it costs $5 a year for it. Also, it looks like if you have any Pokemon from any of the other DS games, they'll have to be transferred to Black/White or Black 2/White 2.
Also for your post back on page 1, for friend codes to work, each person has to add each other's friend codes. I added your friend code, by the way!

Mine is 0387-8974-5174 if you'd like to add me! If anyone else adds me, let me know so I can add you too!