Received one reply from Alexey Popov to the original post referring to:
http://www.freebsd.org/cgi/query-pr.cgi?pr=117820
As described in the PR, Alexey added the following workaround which
was tested on FreeBSD 7-PRERELEASE.
No crashes have been observed since this change.
The workaround is:
Using a Hawking HWUG1 with rum0 running FreeBSD 7-PRERELEASE cvsup'd to
releng_7 on 1-27-08.
rum0: Ralink 802.11 bg WLAN, class 0/0, rev 2.00/0.01, addr 3 on uhub5
rum0: MAC/BBP RT2573 (rev 0x2573a), RF RT2528
rum0: Ethernet address: 00:0e:3b:08:d0:e6
rum0: if_start running deferred for Giant
