What kind of cloud based hosted database solution(s) are available for hosting mongodb as a service.
MongoHQ seems to offer this service, but are there other vendors?
Mongo HQ and Mongo Machine are the only spots really offering to "host" it per se. It looks like Heroku works with MongoHQ, so you can already get a flexible hosted solution.
The rest of the list include are VPS or cloud providers (i.e.: install on your own machine).
There are a few good reasons for this, but the primary reason is simply that MongoDB is still very new.
So if you want to build a "hobby" app, you'll have to use MongoHQ pulling data over the net. Otherwise you can host your own on your server. Unfortunately, there's not a lot of in-between right now.
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