I EDC a Victorinox Tinker (usually) or a Voyager Lite. The corkscrews on them have opened many bottles of wine for me. Although they lack a locking blade, they have a few benefits that outweigh that negative, IMO.

- scissors (best tool on a SAK, for my $$)
- second blade (one for messy jobs, one for finer work)
- fits more easily into chino pockets, and into a business atmosphere in general. The mid-range SAKs are ubiquitous, and don't frighten anyone.

If I were buying a new pocketknife today, I'd look at the Wenger Evolutions. Although they have not yet figured out that the perfect combination equals 2 blades plus scissors, they have added a locking main blade to their mid-range knives.

I have found an opening technique that works well with the SAK. It's not pretty, but it keeps the wine in the bottle.
1. Insert corkscrew as usual.
2. Stand up, and brace bottle between your feet.
3. Bend at the knees and grasp the knife body.
4. Lift with the legs and twist slightly.

The cork comes out like it's greased, and the bottle doesn't move. Also entertaining at cocktail parties.