Thanks for all contributions!
But, no cigar yet! I'm not happy with the proposed workflows.

I've been googling for hours now. I've checked out RememberTheMilk (which basically works). Problem: You cannot copy anything out of the n900 app. Plus it doesn't give you clickable links.

Evernote / Qvernote (n900) looks overkill for the job, too.

Now here would have been the perfect candidate: Sabifoo
A service that lets you IM a note (or a link) and archives it to an RSS feed. Sadly, that service was closed down.

Now that would have been the perfect workflow. Copy link, paste to icq and send, check rss feed on n900.

Let's see what else is out there.