Hmm well I've used the WAP54G in a mixed environment with no problems. You could use any brand of access point (more or less), I'm only really familiar with linksys.....I'm not suprised that it did not work with your d-link though - you'd be lucky for a d-link device to connect to another d-link device let alone a linksys! As far as I'm concerned, d-link wireless products are Sh** with a capital 'S' (and I say that from experience rather than any loyalty to linksys)

I agree though, DD-WRT is great software!!!!!!