i can help groink.
what you have is pretty standard lag that appears on all galaxy s phones due to the dodgy .rfs file system.
thankfully for you the geeks on xda have developed a fix.
the change the phone to use the ext2 file system instead.
its a .apk file.
Copy over the APK file onto your phone, and run/install it as normal using 'My Files'. There will be a 'One Click Lag Fix' app installed. Run that, and select the option you want!
then do not use or touch ur phone till it finishes 10 mins later at least.
i put it on megaupload for you.
http://www.megaupload.com/?d=DLINIHQVenjoy.