XMPP MIA?

I've been trying to hit-up xmpp.org for two days now and nothing, nada, zilch from their authoritative DNS server. My dig for the www looks like so:

--> dig www.xmpp.org

; <<>> DiG 9.4.1-P1 <<>> www.xmpp.org
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54001
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 8
;; WARNING: recursion requested but not available

;; QUESTION SECTION:
;www.xmpp.org.                  IN      A

;; AUTHORITY SECTION:
org.                    45762   IN      NS      TLD2.ULTRADNS.NET.
org.                    45762   IN      NS      TLD5.ULTRADNS.INFO.
org.                    45762   IN      NS      TLD4.ULTRADNS.org.
org.                    45762   IN      NS      TLD6.ULTRADNS.CO.UK.
org.                    45762   IN      NS      TLD3.ULTRADNS.org.
org.                    45762   IN      NS      TLD1.ULTRADNS.NET.

;; ADDITIONAL SECTION:
TLD2.ULTRADNS.NET.      45863   IN      A       204.74.113.1
TLD5.ULTRADNS.INFO.     1251    IN      A       192.100.59.11
TLD4.ULTRADNS.org.      45762   IN      AAAA    2001:502:100e::1
TLD4.ULTRADNS.org.      45902   IN      A       199.7.67.1
TLD6.ULTRADNS.CO.UK.    477     IN      A       198.133.199.11
TLD3.ULTRADNS.org.      45863   IN      A       199.7.66.1
TLD1.ULTRADNS.NET.      45762   IN      AAAA    2001:502:d399::1
TLD1.ULTRADNS.NET.      45863   IN      A       204.74.112.1

;; Query time: 62 msec
;; SERVER: 209.244.0.1#53(209.244.0.1)
;; WHEN: Wed Aug 22 23:49:06 2007
;; MSG SIZE  rcvd: 344

I like XMPP, I do. But if *they* can't get their DNS right, I'm scared (XMPP depends heavily on DNS working properly).