First off, the site has been updated as a good number of lineups have already been sent in and more FA's have been signed. So if you sent something in, check the site and make sure all's ok.
Secondly, don't expect the sim to get going at 8 PM. I doubt I will have enough time to enter all PM's before The Office and 30 Rock come on, so expect it later that night or early Friday... depending on how many people send changes in and how extensive the changes are.
And finally, if you are sending mass transaction moves (promotions, demotions, release, etc), please refer to the link below. Only a few teams have this off-season and it really does make it easy for me.
http://www.strike3forums.com/forums/...on-beyond.html
Good luck!