HANA Architecture Bluebooks / Technical reference architectures
Is there a HANA architecture bluebook or technical reference architecture that describes the components of SAP HANA and its architecture?
IBM released one new Redbook about 'In-memory Computing with SAP HANA on IBM eX5 Systems' that describes many details about the SAP HANA architecture.
More information from IBM about that topic can be found here:
HP also has an entire are with several documents about this area.