http://www.ipathetn.com/pdf/DJAIG_infosheet.pdf - it trades as an ETF(good for us aliens!), is backed by T-bills rather than TIPs, is cheaper than PCRIX(as the "e/r" includes the cost of the futures according to Larry Swedroe) and might hold a tax advantage as less/no income(?) but only capital gains.
Cheers!
Cheers!