As is noted on the Zend Developer Zone today, the Call for Papers has been extended for this year's Zend/PHP Conference by another week. The deadline's now May 17th.
Due to comments on the originally short time-frame allowed for the CFP, we have extended the deadline to May 17th to allow a more reasonable time for submissions. We have also clarified the speaker expenses in the updated text below.
The post also gives a bit more detail than before on how the speakers are compensated for this year's event. If you'd like to submit your ideas, head to the submissions page and enter as many as you'd like!