CGK, that's probably a pretty near estimate.
I'd feel hard pressed to go over 50,000 phones out there running webOS...and you wouldn't want to see me hard pressed*...
This year, Astraware came out with some TouchPad versions of about 5 or 6 of their games, and I think the total number of purchased games passed the 8,000 mark. I'll bet most of those purchases were from members or readers of this forum. Some of those purchases were multiple purchases from the same user. In other words, Fred bought Odd Blob, then decided to buy Casino, then decided to buy Suduko. So out of the 8,000 purchases, I would estimate about 4,000 unique TouchPads.
By the way, regarding the Mobile HotSpot, Kataran, were you telling the young lady that FreeTether on the Pre2 would serve her needs (pretty simple to do and use) or that she could use Mobile Hot Spot on her Pre2 for free (much more difficult for the average Joe...or Josephine...as John Steffes discussed the process)?
* This was Bruce Banner's original attempt at a good Hulk Prevention line...but for some reason, it didn't pass the guacamole (I would say 'mustard', but it's not green...so...)