HP should do what they should've done a while ago: promise to make WebOS well-supported and well-stocked with apps, and bring the TouchPad into production at $200 or $250 to still undercut the competition but not bleed cash so profusely. I'd buy into it as a user and a developer.
$250 for what is essentially a handy, high-tech toy is about right. Plus, HP wouldn't be senselessly bleeding so much cash. Ebay sales show up people are clearly willing to drop $200-250 on the things, there's really no reason they should have or should keep selling them at $100-150.