Comment Give power of attorney to a trusted person (Score 2, Informative) 312
...and do your bank-business with this person via email or telephone.
And yes, you should keep notes of all the expenses you make with your credit-card and communicate this with your trusted person. A debit-card and ATM-machines work better, most of the times. (Mastercard or Visa). Use only ATM-machines in banks during office-hours.
If you want to be connected:
In most of the Latin countries you can get prepaid "Banda Hancha". Most of them work with a Huawei-modem.
"Keep in mind that many places have very poor bandwidth and latency."
I don't know what this has to do with security of your data.
It is also not my personal experience. (I live in rural South Chile). To get a new release of my OS takes 24 hours on broadband. If I go to the next village, I'm ready in an hour by hooking up my laptop to the Internet-Cafe infrastructure.
If you want to keep a blog, do it via http://www.posterous.com./ Blogging via email, perfect if you don't know when you will hook up to the Internet again. Of course you use an email-client.
Don't let them steal your netbook but realize it can happen.