I almost linked to this, too, in the "Western Union says Bitcoin is not ready for international transfer" discussion[1]. The interesting thing about Hawala is that it provides a ready source of liquidity in local currencies. If someone was to link the two (ie, a local Hawala agent accepted a Bitcoin transfer from an untrusted source, and then moved the money via the trusted Hawala network) then almost all the problem…
Have a look at Eko (http://eko.co.in). Eko is creating a network of trusted agents to service cash-in/ cash-out/ money-transfer needs of billions of non-tech-savvy customers.
The cue given by you could be an interesting opportunity for companies like Eko to explore.
Kenya's m-Pesa is a similar network of mobile money agents that indeed started accepting Bitcoins recently [2]!
[2] http://www.mobilepaymentstoday.com/article/216119/M-PESA-mee...