Ask HN: Multi-Monitor w/ Laptop?

I've been running two monitors on my desktop pc for a few years now and I really like it. In fact I'd say it's a requirement for me.

My next pc purchase will in all likelihood be a laptop. When I'm at home (or at the office) I'd like to maintain a multi-monitor setup with my 2 LCDs. My first thought was to use a docking station to pull this off.

Has anyone had any luck running a laptop in a multi-monitor scenario using a docking station? Are there any docking stations out there that support this?

If found this...

http://www.digitaltigers.com/sidecar.asp

...but it seems kind of expensive.

Any thoughts? Recommendations?

Thanks!