There is a nice little cleavage between ET-as-Blog and ET-as-Information Base.  The latter is essentially 'static' and Write-Once.  From an IB design POV the internal interconnections 'twixt and 'tween can be easily handled with the standard GUI keeping the long term storage costs to a minimum.  

(Pointers are Your Friend.)

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre