Great is really great, I was succesfully UPGRADE my WordPress Engine be 2.0. This take no more that five minutes (not includes upload my new files to server)

And yuppy, all my plugins running well (include my fave smile from Priyadi plugin).

This my step by step

• Delete all my Files (exclude wp-content directory, wp-config.php)
• Upload all new WordPress 2.0 Files (exclude wp-content, coz I was have it)
• Point URI to www.mydomain.com/wp-admin/upgrade.php and follow the step
• done and write this post

Go Upgrade you engine. Do you was upgrade :-/