The first time I tried to feed my "AWASU" RSS reader with BandAMP's rss. It showed me several errors like

18apr06 11:09:56 BandAMP Feed error: Can't update the feed.
                 - XML parse failed (4:L138/C10): not well-formed (invalid token)
18apr06 11:10:25 BandAMP Feed error: Can't update the feed.
                 - XML parse failed (4:L138/C10): not well-formed (invalid token)
18apr06 11:13:27 BandAMP Feed error: Can't update the feed.
                 - XML parse failed (4:L105/C10): not well-formed (invalid token)
18apr06 11:13:28 BandAMP Feed error: Can't update the feed.
                 - XML parse failed (4:L105/C10): not well-formed (invalid token)
18apr06 11:16:43 BandAMP Feed error: Can't update the feed.
                 - XML parse failed (4:L105/C10): not well-formed (invalid token)

What can I do? Please help.

What's AWASU and RSS?

      > Iszil

To say it in simple words RSS is an XML based newsletter format which can be used to feed an RSS system like a reader or so. If you tell this reader where the RSS file is hosted (the URL of the file like http://forum.bandamp.com/audio_review.rss) then you can open a channel to this site and get the latest news on this reader. BandAMP generates two formats RSS and ATOM. And AWASU is a software developer for reading these formats.
Have a look at the review forum at the very end of the site. There you can see two icons that open an XML source. They contain the latest news.

So I wanted to figure out how this works and got above errors.

Maybe anyone can help me out?

Fixed the problem:
Forget about the AWASU RSS reader and use the Firefox Wizz RSS extension. Works really fine.