Flyspell/ispell operational mismatch

[Richard.G.Bielawski]

"GNU Emacs 22.0.50 (i386-msvc-nt5.1.2600)
 of 2005-06-19 on LD1"

Flyspell mode marks 2 letter words as misspelled while
ispell-word ignores 2 letter words.  This leaves one unable to
correct some Flyspell flagged words using M-$.

While it's possible to use flyspell-correct-word, that's terribly
inconvenient since it can't be mapped to a keystroke due to
requiring a mouse event as a parameter.

Since the correct action would often be to add the word to one of
the dictionaries rather than change spelling, manually fixing the
word isn't usually an option.  I don't really have an opinion on
which should be changed but it seems they should either both
ignore 2 letter words or both allow for fixing them.

Also:
I'm quite surprised I find no option to ignore words with numbers
or that contain only capital letters.  This seems to be quite
'standard functionality' in most spell checkers I've used.  Have
I missed something here?  It's certainly something I'd turn on 
if I knew how.

Thanks

Richard Bielawski