Hi there!
 I suddenly noticed that it's been over a month since I posted the original 
"Borg Thoughts", and the messages prompted by it have been going ever since. 
I thought I'd post a compilation for the benefit of those who haven't seen 
all of them.
Original Question #2:
Why are there no non-humanoid Borg?
 Again, apologies to those caught by my lack of precision. What I meant was 
"Why have we never seen any non-humanoid Borg?"
 Rupert Woolger suggested that it was part and parcel of the question "Why do 
we so rarely see *any* non-humanoid species?"
 Victoria Mackey fell back on the unimaginative invoking of real life 
explanation: "too expensive to do on-screen".
 Luke Fischer suggested that the non-humanoid Borg were elsewhere in Borg 
space, or on a planet somewhere.
 He pointed out that the Borg ships we've seen are designed to best 
accommodate humanoids, and larger life-forms would have trouble fitting into 
some of the corridors.
 
 Robin Arnaud suggested that, since humanoid races on Star Trek, by 
definition, have a common ancestry, non-humanoids may lack whatever it is 
that makes a life form suitable for assimilation.
 This is a perfect cue to mention that many of the posts inspired by the 
question were on the subject of what "non-humanoid" actually means.
 A number of posts, including one from Brian Dickens, pointed out that there 
are Borg of Romulan, Klingon, etc origin in various stories, notably the Voy 
ep "Unity".
 However, if I'd meant "non-human", I'd have said so. Most of the Borg we've 
seen have to be from non-human (if human-looking) races anyway, because the 
Borg haven't spent that much time in human space.
 Greg Reid pointed out the use of "Vulcanoid" in "Who Watches the Watchers?" 
and "near-humanoid" in "Code of Honour", and attempted to promote the 
restriction of "humanoid" to
 
 GR> species which are (1) indistinguishable from Earth-humands by physical
 GR> observation, AND (2) with enough genetic similarity that they can breed
 GR> with Earth-humans freely (ie: without using advanced genetic engineering
 GR> technologies).
 However, the "near-humanoids" in "Code of Honour" were, in his own words, 
"indistinguishable from humands", so it would appear that his definition is 
not the one used by Trek writers.
 His classification of all races-that-can-be-represented-by-an-actor-with- 
makeup as "bipeds" also raises questions: what do we call the larger group 
that also includes apes, birds, and monkeys?
 In addition, his examples both come, IIRC, from before the establishment of 
the "common ancestor" definition of humanoid life, and so the usages spring 
from an incomplete understanding of what a humanoid is.
 The idea of Borg Tribbles seemed to catch many imaginations. Many were the 
posts about Bibbles, Boibbles, Tribborg, Borbles, and Bribbles. Nobody seemed 
to mind that Tribbles, being non-sentient, wouldn't be good candidates for 
assimilation.
 Brian Davis suggested that, since the Borg use the best features of species 
they assimilate, Tribbles could give them the ability to reproduce rapidly 
and overrun the universe in a much shorter time.
 Jack Ruttan conjured up an image of "Little fluffy things with laser-beam 
eyepieces. And they're everywhere."
 As Jim Buntjer said, it Borgles the mind.
 Horta were also fairly popular, with most of the discussion revolving around 
the difficulties associated with assimilating one.
 As Victoria Mackey pointed out, what would you call it? A Borta, said Jack 
Ruttan. Or a Horg, he added later.
 Janet Cone also raised the question of diet. (Hortas eat metal, for those 
who didn't know.) Can you assimilate a being by implanting bits of food into 
various parts of its body?
 A more unusual offshoot of the discussion was a brief diversion, triggered 
by Jack Ruttan, into the question of whether the Borg stole "Resistance is 
futile!" from their Doctor Who predecessors, the Cybermen.
 For the record, the Cybermen never used the phrase. It was, however, used by 
a Dalek in the 1964 story "The Dalek Invasion of Earth".
... Daleks of Borg: "ASSIMILATE! ASSI-MIL-ATE!!!!!"  
--- Blue Wave/Max v2.30 [NR]
---------------