We had several new/upgraded hams at Field Day who worked HF for the first time. Now that they have had a taste they found it to be a whole different world from VHF/UHF and need some more of it. The next "Big Deal" is the IARU HF World Championship July 14th and 15th UTC.
The IARU contest is different from Field Day in that the emphasis is on contacting other ITU regions, and therefore other countries. This contest is a great opportunity for the casual HF'er to pick up new countries. You don't have to work the entire 24 hour period to pick up 40, 60, or 100 new countries.
Mark you calendars for July 14th and 15th. I'll remind everyone when it gets closer and give those who have never worked a contest some pointers.