I own a lot of names like this but I try to keep it limited to huge global ncities (iMumbai, iBogota) or places in the US I can conceivably travel to.
I do avoid randoms...
If you don't develop them, they won't earn, but I do believe they have decent future potential and occasionally, you stumble into an end-user who's willing to offer a price that results in decent profit. They seem to go through a fairly regular "register out of excitement/drop in despair" cycle with domainers...
I saw iVienna drop and decided to not go after it. iMontevideo is sitting out there for reg, if you're after names like this.