Hey Whatsagoodname. I to have a DLINK router (DI-624) an have found it works great. If you're seeing it as locked on your Wii check your encryption settings for your WIFI either on the Wii (enter in all the passwords etc.) or if that fails, on the router itself (default is 192.168.0.1 in your web browser). I found setting it to channal 11 and making sure it is broadcasting in both g and b modes helps.
Let me know how you go with it. I'll check back later.