Tethering the Current Pentax DSLRs?

I've seen people from day to day are asking for tethering support for the current or just the later Pentax DSLRs including the K-5, K-r, 645D and K-7 etc., which all lacks such a function. Recent examples:-http://forums.dpreview.com/forums/readflat.asp?forum=1036&thread=36797719http://www.pentaxforums.com/forums/pentax-dslr-discussion/120241-tether-my-k-7-k-5-645d-please.htmlAnd yes, back to the