No, not like that. There is an option to add read-only replicas of the main database. We sometimes had the question with multi-server configuration (Help needed to setup a NC14 cluster - #17 by Finalls), which is interesting for real high-volume setups where a single server is not enough.
in such cases, they might restrict the number of queries per minute and stuff like that, so the overall performance in the end is not great.
Also the size is not evenly spread over tables, so you might end up with a table that cannot be managed by one database alone.