JamBase (free, iPhone) gets a thumbs up for its good interface, nice localization, and how easy it makes it to find tons of local stuff. While the app doesn't allow you to buy tickets, it's a good way to see what's near you.

Find Your Fix (free, iPhone) gets a thumbs down -- the app aims to provide a wide variety of entertainment info, but its video trailers doesn't function correctly (we heard sound but no video) and despite decent news feed, you can't pull up the concert you searched for.

GigZoo (free, iPhone) gets an emphatic thumbs up and the devil horns too -- it's what an app like this should be. Sporting a cool interface, GigZoo can locate you, accesses your iTunes library to find bands you might want to follow, and lets you add multiple search locations. While it doesn't let you buy tickets, it does everything else and does this well.

StubHub (free, iPhone) rocks the thumbs up too. Its localization works well, it hooks in nicely with social media, and makes it easy to find event in your area, buy a ticket, and have it FedEx'ed.

Live Nation (free, iPhone) gets a more tentative thumbs up -- after all, it's essentially Ticketmaster's iOS app. But it features a good interface, speedy search engine, and proves functional up to the point that you might end up paying $211.75 for a single Stevie Nicks ticket.

We'll give Seatwave Tickets (free, iPhone) a thumbs up or whatever the British equivalent is. Useful for travelers to Merry Olde England, the app may charge your ticket prices in British pounds but sports a good interface, solid search engine, and you can find generally find what you're looking for and snag a ticket. Essential if you're heading across the pond and want to catch a cricket match.

Thumbs down and a hearty boo to My Concerts ($0.99, iPhone). Aside from being the only app here that isn't free, it takes forever to load data even over a Wi-Fi connection, essentially defeating its own purpose. Summer doesn't last forever, after all.

And one last thumbs up for eSeats Tickets (free for both iPhone and iPad). Perhaps one of the coolest unknown finds, eSeats Tickets make it pretty easy to find the stuff coming to your area, buy a ticket, and have that ticket FedExed to you.