John, Do you notice any scent? Apparently some fraction of the population does, which they think is unpleasant. I've never noticed anything.
My 'Sunburst' is not blooming (or in bud that I've noticed), but it's finally starting to branch a lot, so I can at least take new cuttings. P. sanguinolenta is finally blooming, so I tried the P. caerulea "pollination" technique. There are a few which are teasing me with small, so far non viable buds ('Mission Dolores', luzmarina, P. tarminiana Alba) and others which I'm still waiting for a bud of any sort (notably P. membranacea). And P. loefgrenii blooms many dangling flowers every day, which is unusual this time of the year. I think we can thank the unusually cool May weather.
I also have these seedlings of P. antioquiensis. These were from seeds I tried to give away but went unclaimed. I count 7 so far (of about 16 planted 24 days ago):
I already have over 50 seedlings, and a few larger ones from last year, including one in the ground. The ones above I promised to return to TF at least in part, but I haven't decided how. The problem is that this is a fairly good size vine, although it's been known to bloom in a 1 gallon pot and as young as a year old (in a mild region of Orange County). It's also a notorious cool grower, so most people can't grow it outside--unless they live near the CA Coast or the Bay. I looked it up, and the elevation it's from in Columbia would make it an ultrahighlander by the Nepenthes classification. It really likes temps between about 33 and 80, dying at about 27 and after too many nights above 65 or days above 85.
I've posted a picture from a friend's plant elsewhere (the source of the seeds). This is a favorite of mine from someone else, actually the guy who is the ultimate source of seeds, several generations ago. Blooming in San Francisco and well worth a click:
http://davesgarden.com/guides/pf/showimage/137454/
Hawken, are your P. antioquiensis seedling(s) doing OK?