Update:11-30Source: network consolidation
There are days that I will add only one picture to iPhoto and it becomes an event. Every time I add a new picture to iPhoto 8 I get a new event. This past week I have been renaming some albums and adding new albums and folders and that has had a very undesired result of now telling me I have 26,624 items in 3,071 events. That, 26,624 number, incidentally, is the same number of photos I have in iPhoto.
If I try to delete an event, I find I am also deleting the pictures in that event from my main iPhoto library. I have also noticed that the events in my events area are randomly numbered, not in any sort of order.
Also, iPhoto 8 does not recognize my camera (Canon PowerShot S5IS) when I try to add photos to iPhoto.

The Best Answer

Welcome to the Apple Discussions. You can't get rid of the Events mode as it's the basic container feature of iPhoto which is organized by date. You can always drag that single event onto another one in the Event mode to join them, thus getting rid of the single event. You can also do that in the Photos mode, with Event names displayed so it's like the old rolls, by dragging a photo or photos into another event.
Regarding the problem of the camera not being recognized that's a tougher problem to fix. A workaround is to use Image Capture to upload the photos to a folder on the desktop and then import the folder into iPhoto.
One user fixed his similar problem with an Archive and Install of Leopard and a reinstall of iPhoto from the disk it came on. As I said, not as easy a fix.
TIP: For insurance against the iPhoto database corruption that many users have experienced I recommend making a backup copy of the Library6.iPhoto database file and keep it current. If problems crop up where iPhoto suddenly can't see any photos or thinks there are no photos in the library, replacing the working Library6.iPhoto file with the backup will often get the library back. By keeping it current I mean backup after each import and/or any serious editing or work on books, slideshows, calendars, cards, etc. That insures that if a problem pops up and you do need to replace the database file, you'll retain all those efforts. It doesn't take long to make the backup and it's good insurance.
I've created an Automator workflow application (requires Tiger), iPhoto dB File Backup, that will copy the selected Library6.iPhoto file from your iPhoto Library folder to the Pictures folder, replacing any previous version of it. It's compatible with iPhoto 08 libraries and Leopard. iPhoto does not have to be closed to run the application, just idle. You can download it at Toad's Cellar. Be sure to read the Read Me pdf file.