The FCC has a PUBLIC NOTICE on how to file petitions and comment
regarding the proposed merger of Sirius and XM Satellite Radio...

Interested parties must file petitions to deny, comments, or informal
comments no later than July 9, 2007...

Responses/Oppositions Due: July 24, 2007

...MB Docket No. 07-57...

...submissions in this matter may be filed electronically (i.e.,
through ECFS) or by hand delivery to the Commission's Massachusetts
Avenue location...

Comments may be filed electronically using the Internet by accessing
the ECFS: http://www.fcc.gov/cgb/ecfs/...

Parties may also submit an electronic comment by Internet e-mail. To
get filing instructions, filers should send an e-mail to ecfs@...,
and include the following words in the body of the message, "get form"...

To request materials in accessible formats for people with
disabilities (braille, large print, electronic files, audio format),
send an e-mail to fcc504@... or call the Consumer & Governmental
Affairs Bureau at 202-418-0530 (voice), 202-418-0432 (tty).

See
http://www.fcc.gov/Daily_Releases/Daily_Business/2007/db0611/DA-07-2417A1.txt