2012-03-13T07:06:54-07:00 L3 sdb[306]: Wi-Fi: a4:d1:d2:71:c1:c0 re-joined XXXX after 30 d 16 h 0 m 18 seconds
2012-03-13T07:06:54-07:00 L3 sdb[306]: Wi-Fi: Number of clients associated 3
Perhaps I'm being picky, but I think the quality of code is always visible in the attention (or lack thereof) to detail in the stuff you see. In the case of the log above, why are days, hours, and minutes abbreviated while seconds is fully spelled out? That's just sloppy thinking.
An old and ongoing problem with the NVG510 concerns DNS resolution. The modem doesn't allow you to change the default DNS servers and either or both of AT&T's DNS servers keep failing to respond ... for example:
2012-03-06T14:37:28-08:00 L3 dnsmasq[2219]: no responses from nameserver '99.99.99.53'