I posted the below in a discussion group on LibraryThing, but I thought some here might be interested:

I
am
now
post
haste
(sort of)
posting
new topic
to discuss.

do you enjoy
constraints?
does word play
give headaches?
Are you confused?

This is a snowball.
A poetic form which
was created by those
who group themselves
with the name of Oulipo.
Every line contains one
additional letter. U like?

More forms for you to enjoy.

Note: I’ve realized I misremembered the constraint, and created a new form, albeit one based on Oulipo. In a traditional snowball, each word has an additional letter.  This would tend to limit the length.  My variation above could go on forever.