General

1. What is HydraCube ?
2. Who all can use it ?
3. Is it free ?
4. Can I sell or distribute ?
5. How can I contribute ?
6. How can I get it ?
7. Who is behind this effort ?

Technical

1. Is it MOLAP or ROLAP ?
2. Does it need to have a RDBMS for data storage?
3. What kind of machine configuration it can run on ?
4. Is there any third party dependency for running ? 
5. Does it use any other software modules / code ? 
6. What all platform it is supported ?
7. Is there a binary distributable ?
8. Can I run the server on different operating systems (heterogeneous cluster) ?
9. Can I run client and server of different operating systems ?
10. Does it have a client API for writing applications ?

Functional

1. Does it support multiple users connected ?
2. Does it have user authentication ?
3. Does it support all features of MDX ?
4. Does it have a graphic tool for entering query and viewing the data ?
5. Does it support attributes in hierarchy ?
6. Is there any limitation on number of dimensions in a cube ?
7. Is there any limitation on depth of levels in a dimension ?
8. Can I share a dimension with multiple cubes ?
9. What is partitioned dimension ?