I found a buttercream recipe on www.ladycakes.com
that's not too sweet; just tried it this week and really like it. It smooths and crusts well, but you can't use the hot spatual method to take out the last few marks, you need to use the Viva paper towel method.
Go to www.Ladycakes.com
, click on recipes, and look under "B" for Buttercream Icing with Flour. They have a lot of good recipes, although Cakecentral is still my favorite web site!