Here is a tentative list of topics (based on the past Twincling events).

Workshop Focus Areas (Technical areas)

. Cloud computing

. Linux/UNIX Administration

. Gentoo Linux 2008.0 Setup and Administration

. OpenSuSe 11 Linux Setup and Administration

. FreeBSD 7 administration

. OpenSolaris 10 administration

. Package management (portage, ports, pkg, rpm)

. Ruby scripting

. Portable shell scripting

. Regular Expressions

. Linux systems programming

. Linux network programming

. Building Linux Clusters

. OpenSolaris Systems Programming

. Linux File system (ext2) concepts and programming

. File system development

. Linux TCP/IP stack internals

. BSD TCP/IP stack internals

. Network Security (SSL, IPSEC)

. OpenSSL and PKI infrastructure essentials

. Developing Anti-Virus software

. Anti-spam software development and Bloom Filters

. PostGreSQL database setup and administration

. PostGreSQL C++ / Ruby / PHP database programming

. LAMP setup, configuration and PHP 5 programming

. WebServices and SOAP programming with PHP

. Drupal module programming (for Drupal 6.2)

. ISO C99 Programming and library development

. OpenSSL API Programming using C

. Firefox architecture and developing Firefox plugins

. Firefox XPCOM C++ programming

. C++ Programming (class based design, functors)

. C++ and STL (Standard Template Library) Programming

. C++ GUI Programming with QT 4.3

. KDE 4.x plugins programming

. Open Source Games design and programming (using KDE/Qt/C++)

. OpenGL Programming (using KDE/Qt/C++)

. Semantic Web Essentials, RDF, Ontology, DAML

. XML essentials and programming (DTD, XMLSchemas, XSLT)

. XML Security vocabularies (XMLDSig, XMLEnc, XMLKMS)

. Core Java Programming

. Enterprise Java Programming (Servlets)

. Middle-tier Java Programming (EJB)

. AJAX programming

. Javascript programming

. REST and JSON programming

. Software Design Patterns

. Model Driven Architecture (MDA)

. Middleware technologies - CORBA - C++ programming

. AI Agent programming using Prolog

. Developing Distributed Applications with Erlang and OTP

. Real-time Streaming Multimedia using Helix Community server

. Mono with GTK#

. Moonlight


Workshop Focus Areas (Open Source Projects)

. Getting started in Open Source Projects

. How to contribute to OpenSuSe Linux project

. How to contribute to Gentoo Linux Project

. KDE 4.x project and opportunities

. Twincling projects

. Open Source Games projects


Thanks to Saifi for compiling this list.
Please feel free to suggest more topics