There's a good few; though there are 2 that I've had experience with, and can recommend solidly, depending on what you want.
Dashwire is the one that SE have promoted, by releasing a panel. The panel is crap, but the application works wonders. It runs in the background from the moment you turn your phone on, and synchronises your phone with its own online service, allowing you to synchronise contacts, missed calls, messages (message sync is buggy though), mobile bookmarks, as well as photos and videos. It doesnt synchronise with services like facebook of flikr, but you have your own profile page, which you can choose via the online private dashboard to make your pictures public.
My favourite though is Shozu. Shozu you CAN send to all your favourite internet services, and more. it has the ability also to interact with the services you use via feeds, for example on facebook, you can get your friends' status updates. Via shozus interface, you can choose the services you wish to incorporate with your phone, including secondary relay services if you choose (meaning one snap can send to both facebook AND flikr), and then when you take your photo, you are prompted "do you want to send...". within moments, your photo is on facebook!
I would well reccomend either, although based on what i've told you above, each has alot of differentiation, for example dashwire sends ALL photos, shozu asks for permission. Dashwire hosts on its own service, shozu syncs with popular ones. Shozu is limited to what it synchronises, dashwire sync's your PIM.
Its your own call, but those are the ones id recommend.