i just opened http://www.roku.com in incognito Chrome tab and w/o clicking anything, that ate 130MB. roWebKit? ... ro_i_dont_think_so!
Fact is, all *.roku.com web sites (spare forums.roku.com) are memory hogs - load slow, do not animate well, sometimes miss things, other times the tab may bomb. Why is that, how would you explain it?