Mac OS X Platform Desktop Application Developer

For an upcoming project, we are looking for a good Apple OS X platform freelance developer to assist in the building of desktop applications. You must have a proven track record in this field. The proposed software application will interact extensively with web-based content, pushing and pulling it as needed. A very secure transmit mechanism will need to be developed along with relevant intelligent local caching and buffering for when web access is not available. Although the start-time is soon, the project time-frame will be inside the Tiger / Leopard migration period so freelancers who are experimenting with the Leopard beta, and like longer terms projects are preferred. Please reply with examples of past work, qualifications, rates, etc. You must be UK-based. No agencies.