No I havent gotten on Facebook since I use a company provided computer and they frown on Facebook, Myspace and others.
You seem to have a good knowledge of the scripture which I appreciate. So many are satisfied with the milk of the word and never grow much beyond their salvation. To grow as a Christian, you have to "eat" some of the meat the word of God provides for us. Some of the meatier things in the word of God is referred to as the "deep things" of God. I believe that 10% is a good guidline for tithing, but you are right , it is Old Testament law and not New Testament grace. Giving is a grace and it should originate from the heart. We do worship on the first day of the week because that is the Resurrection Day when the tomb of the Saviour was found empty. Wednesday is a man-made day to gather as believers to pray, worship and get that middle of the week charge, which I find myself needing.
Thanks for your sincerity as a Christian.