It is an apt goodbye for the 23-year-old D’Angelo, who is leaving the social-networking site to boldly go where few other geeks have gone before (that would be away from one of Silicon Valley’s hottest start-ups before its much-anticipated IPO).

D’Angelo, in a story broken by BoomTown last night (while not getting to eat our lovely Mother’s Day dinner), is leaving Facebook for parts unknown after, said sources, he “felt his responsibilities no longer fit well with his skills and interests.”

But kudos to the soft-spoken D’Angelo, a high school friend of Facebook Founder and CEO Mark Zuckerberg, for building a service that is one of the more elegant to appear on the Internet in years.

While BoomTown has been tough on the start-up for management woes and its nutty valuation and its need for a more robust business plan, there is no denying that Facebook itself–at its most basic techie core–is really well done.

Thus, for D’Angelo, I am guessing this is not the final frontier, before another Internet outfit beams him up.

(No, I could not resist.)