Help Kies Mini and 2.2 update Q's.....


curious of a couple things...
1st: should I keep Kies Mini installed on my pc? If not why? what may I need it for?
2nd: I did the update back the day it bacame avail using Kies Mini and noticed that we got 2.2, not 2.2.1 wich is the most recent of the Froyo update. are we missing anything important here? Is the 2.2.1 not avail for the Vibrant?
Just curious on these things, been thinking about them since the update & decided to ask.....thx!