The Panelists: Steve Rubel and Dave Kerpen with moderator Mathew Ingram.

Although there are thousands of social networking services, the landscape is dominated by a small handful of players: Facebook, Twitter, LinkedIn and perhaps Google+.

The question is whether there is room my new entrants. For all the talk about Diaspora and, mostly recently, Unthink, there hasn’t been a new kid of social block of any significance in the past few years with the exception of Google+, which is supported by Google’s digital dominance.

What would it take for a new player to establish a strong foothold? What would a new service have to offer and how would it have to market itself to capture the attention of social media users who are increasingly reluctant to wander from existing services? And what should brands do when a new service appears on the scene? Should they jump onto the bandwagon or wait on the sidelines until they know the new service has traction? Come see Rubel and Kerpen provide insight into the competitive social media landscape.

Tickets for meshmarketing can be purchased here. Information about the speakers and schedule is here.

In that vein, we’ve set up a couple of interesting ways for you to tell us what questions you want the answers to at mesh ’09.

I’m going to be chatting with Mike Masnick — founder and CEO of Floor64 and chief blogger at Techdirt.com — as part of the media “keynote conversation” this year, and I’ve set up a Google Moderator account so that you can submit questions you’d like Mike to answer, and/or vote on questions that others have suggested we ask.

Rob Hyndman will be speaking with Kiva.org founder Jessica Jackley in the keynote conversation for the society stream, and he’s set up a Google Moderator account as well for your submissions.

And Mark Evans will be talking with musician David Usher as part of the media stream, and has used Rypple — the customer feedback service that is also a mesh sponsor — to gather questions for his chat.

We can’t promise that we’ll ask every question you submit, but we’ll certainly do our best. Feel free to leave some in the comments on this post as well, or find us on Twitter at @meshconference, @mathewi, @markevans and @rhh.

mesh on!