Apple vice president of worldwide marketing Phil Schiller will deliver the keynote speech at Seybold Seminars, San Francisco in September.

He will be introduced to Seybold's professional-publishing audience by Steve Jobs – over a satellite link and from an 'undisclosed location', reveals MacCentral.

This is seen as the biggest hint yet that Jobs will deliver the keynote speech at Apple Expo, Paris. However, Apple is yet to confirm whether Jobs will be attending.

Seybold Seminars runs from September 24-28, while Apple Expo Paris is being held from September 26-30. Other Seybold keynote speakers confirmed so far include Quark CEO Fred Ebrahimi, and Adobe CEO Bruce Chizen.

It is not yet known whether either keynote will be webcast.

In related news, Adobe will be exhibiting at Apple Expo. The company has booked a larger store than last year, and it will be opposite the Apple booth, according to Macworld UK's sources. Registration for the Paris keynote ends today.