Apple has just sent out invitations to the press inviting them to come to an event they are holding on April 8th. The topic? A preview of iPhone OS 4. This is a little bit strange seeing as Apple JUST released the iPad. I guess it’s good though since the developers could use some extra time to figure out exactly what kind of improvements that they’ll be ale to make to their apps with whatever new features iPhone OS 4 brings to the table. We’ll just have to wait and see what Apple has in store for us on Thursday.