I also just signed up for WiseBanyan. I was looking for an alternative to my Roth IRA with American Funds which was high fee anyway, and I recently learned I wasn't eligible to contribute to anyway due to the Foreign Earned Income Exemption (FEIE).
From what I've been reading online, a lot of companies are making it much harder for expats to invest in mutual funds due to some recent 2012/2013 law changes. Additionally, I don't yet meet a lot of the minimum requirements for the Vanguard Admiral Shares unless I neglect my desired asset allocation. Another poster on here recommended Vanguard ETFs instead, so I'd been looking into that and had done some reading and come up with my desired asset allocation. I was excited, but it seemed like a LOT of work, and I still wasn't sure how much trouble it would be to open a Vanguard account from overseas, as I've read of people having trouble with them (as well as other brokers).
In my looking around, I stumbled across WiseBanyan. I signed up for the waiting list and in the interim did some reading. WiseBanyan seemed to have more or less the same breakdown of ETFs that I was looking into buying, but for way less trouble than trying to manage them myself, and without the partial share issue I was going to run into with my desired strategy of monthly buys (yeah yeah Dollar Cost Averaging may not be so helpful, but it helps my budget and makes sure I actually contribute SOMETHING instead of waiting forever).
The only snag I've run into so far was that my employer does not have a US address (I do, so I legally fit all of the requirements for signing up for their accounts and from what I've researched for buying ETFs). E-mailed customer support over the weekend and got a helpful reply Monday morning US time. Currently waiting on my account to finish processing.
I put in $1000 to start with and see if I like it. I thought that was fairly conservative, though now that I see you all putting in $100 maybe it's not as conservative as I thought.