As well as the usual drag-n-drop transformation GUI, this apparently supports business process modelling - which gives Talend a feature that many "real" ETL/EAI tools don't have. There's also support for using a server grid to parallelise processing, and there's an "on demand" SaaS offering.
Version 2.0 is now available, as well as a 2.1 release candidate which is said to add features including:
- further optimizations for performance increase
- support of new databases (including bulk load)
- transaction management (connection sharing, commit and rollback)
- Slowly Changing Dimensions support
- MOM (Message Oriented Middleware) support for real-time integration jobs
- fuzzy logic data matching (using the Levenshtein and metaphone algorithms)
- normalization, denormalization and flow merge
- support of SSH remote connections
- support of PGP file decryption (through GPG binary)
- reinforced support of the XML standard: DTD validation, XSD, XSLT transformation, significant improvements in hierarchical XML file generation, support of the XMLRPC Web Services protocol…
- improvements to the tMap component, to support input filters and new joins types such (the cartesian product, first match, last match…)
Sounds like it might be worth a closer look...