Yep, DD-WRT is a decently-stable firmware. Just make sure you read some of the stickied posts on the dd-wrt forums before deciding which version to load on your router. The 'recommended firmware' database isn't up-to-date, last I read. Also, the gurus on the forums describe dd-wrt as 'a cadillac, not a porche'. DD-WRT prioritizes options and stability over speed.

At the risk of starting an e-peen contest, I have a Linksys wrt54g-TM, wap54g, and Microsoft MN-700. All with dd-wrt on them, and using WDS. Never had a problem with them.