According to the specs of the Samsung Galaxy Tab 10.1 [1] and the iPad 2 [2] the Tab weighs in at 565g and the iPad 2 is 601g. Are you seriously trying to tell me that an extra 36g (being just over an ounce) was a major motivation in deciding what to purchase?
There may be reasons you bought the Tab but (IMHO) 36g wasn't an important consideration (or even a consideration at all).
You and five friends own them? How many of you purchased them as opposed to, say, getting them for free from Google IO this year?
[1]: http://www.samsung.com/global/microsite/galaxytab/10.1/spec....