I feel that Couch has too much server side programming. It can be off puting sometimes. If anyone wants to make some money, I'd suggest them putting a server on top of a couch cluster that receives mongo queries.
I mean, how hard can it be to
1) Manage some indexes,
2) Keep some metadata around and
3) Build some half-assed single index query planner?
Couch is already a solid piece of technology. It just needs a better API to "sit" on top of it, kinda like what Membase is doing now.
edit: or on top of Riak, Cassandra, PostgreSQL or etc ... on the API side, Mongo has clearly won.
