Mobile 2.0, a conference for mobile web developers, has announced the lineup of companies that will present at its Nov. 3 event. The one-day conference in San Francisco will focus on strategies to make mobile apps and services thrive during the economic downturn.

We’ve covered many of these startups already — and some have demoed at past Mobile 2.0 events — but since most of them are based in Europe, this should be a good opportunity for the Silicon Valley crowd to see their products in action. A lot of these social apps and messaging tools sound pretty similar, so it will be important to see which ones are really executing well. Two other “wild-card” presenters will be announced closer to the event.

Here are the companies, in alphabetical order:

aka-aki (Germany) focuses on “proximity networking,” in other words helping you meet strangers by alerting you when other aka-aki members with Bluetooth-enabled phones are nearby.

Dial2Do (Ireland) is a “hands-free” service that allows you to accomplish common tasks like sending text messages and emails by just calling a number and speaking. You can be productive while driving without breaking California law or threatening the lives of everyone else on the highway.

Nimbuzz (Netherlands) provides a free mobile messaging service. We’ve been impressed by its range of features but also worried that it’s trying to do too much.

Rummble (United Kingdon) is a location-based social networking tool. Features include venue revenues, personalized recommendations and microblogging.

Seesmic (United States) provides video messaging technology that powers, among other things, video comments at VentureBeat. Earlier this month, the company announced it’s laying off seven employees.

Wubud (United Kingdom) is a mobile social network that’s still in stealth mode. It recently raised a small angel round from Paul Birch, cofounder of social networking site Bebo.

Zipipop (Finland) is developing a service called Zipiko, a mobile application for sorting out your social life. Basically, it lets you post your plans and coordinate with your friends.

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