Dear Colleagues, this is a general letter. It contains essentially no new information, compared to the web-page http://www.math.uit.no/pdes2007/index.html. But here are some reminders: If you're decided with your trip, please provide details or give some tentative information (except for those participants who already did so). We do not advice waiting longer with booking of tickets (and we urge you to arrive no later than 6PM on August 12; discuss it with us otherwise). Also if you need a hotel in Tromso, it worth booking it earliest (there are still places, but some hotels are already full). You are welcome to consult on the trip, if there's a need. The conference will have 3.5 working days during August 13-16 (12 is arrival and 17 departure!) and half-a-day excursion. So we expect to have around 30 talks, but we'll be more precise on this issue in the next letter, which comes somewhere in mid-June. In July we write more on social part. Due to organizers' trip plans there can be delays with correspondence in June. Please be patient, we shall definitely answer you. And if there're things to decide, it is better to discuss rather now in May. All the best, Organizers.