Unfortunately, I am not a unix or php programmer. LastRSS if for sharp folks like you, who build websites and want to include a Feed window (island).

And looking at the LastRSS site, what do they mean with the feature:
    "Strips HTML from description (both hard-coded and entity-coded"

If it strips HTML out, does it interpret the HTML, or just remove the tags and print the rest? And what about UBB tags?

What I am asking for (and this is beginning to sound futile) is a description section that includes enough HTML so that a simple browser will display the post similarly to the way it is displayed in Threads.