A must read - User experience guidelines for IBM Lotus rich client applications and plug-ins

An excellent document to read, it's really useful.

This white paper describes user-interface design and interaction guidelines for designers and developers who are building IBM® Lotus® Notes® applications, IBM Lotus Sametime® V7.5 or later plug-ins, IBM Lotus Symphony™ plug-ins, IBM Lotus Expeditor plug-ins, or composite applications (assembling any mixture of plug-ins, Lotus Notes applications, and components built with IBM Lotus Component Designer).

http://www.ibm.com/developerworks/lotus/documentation/d-ls-ueguidelines/

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