I'll give my opinion on the Mark of the Beast if people want to hear...
I beleive it will be a literal mark, the KJV Bible uses the the word 'in' in Revelations 13 verse 16 i think ... also ... the New testament is written in greek ... we must remember that this number 666 is not just three 6's, but 600 + 60 + 6
Something interesting some people may want to know ...
Did you know the unit 1000 to babylonians was 600, and 100 was 60 to them, and 10 was 6 to them (making three sixes)
Anyway back to the topic...
In greek ... 600 = Chi
60 = Xi
6 = Stigma
666 making Chi Xi Stigma in greek. Stigma (6) in greek is now obsolete, but it was used in Revelations in the N.T ... Strong's Concordance, # G5516 has a reference to it i think.
the phrase 666 translated in greek is Chi Xi Stigma, the meaning of this is ... "stigma, stig'-mah; from a prim. stizo (to "stick", i.e. prick); a mark incised or punched (for recognition of ownership), i.e. (fig.) scar of service:--mark"
Another important thing to note down for researching about the 666 is ... that the Greek word used in Revelations for the word 'Mark' is Charagma, here is what it means according to Strongs Concordance...
charagma
khar'-ag-mah
From the same as G5482; a scratch or etching, that is, stamp (as a badge of servitude), or sculptured figure (statue): - graven, mark.
This is one of the reasons why i think its very likely that the Mark of the Beast will be a literal physical mark, i.e ... Microchip implant (ADS Verichip, DigitalAngel etc)
I hope somebody found my information useful. Please comment on it