Remove vowels without using too many different characters

Brainfuck, 8 distinct (2121 total)

>,+[-<>>>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++>[-]+<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>>[-]++<[-<+>>>>->>>->>>->>>->>>->>>->>>->>>->>>->>>-<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<>]>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>[<<<]+>-[<-<.>>-]<[<<<]<[-]>,+]

The distict characters: <>+-[],.. Works with interpreters that use -1 for EOF.

$ echo '
This program will remove VOWELS.
So we can now speak without them.
' | bf vowel-rm.bf

Ths prgrm wll rmv VWLS.
S w cn nw spk wtht thm.

Whitespace, 3 points (218 chars)

You knew it was coming.

↲___↲____↲⇥↲⇥_____↲___⇥_____⇥↲___⇥___⇥_⇥↲___⇥__⇥__⇥↲___⇥__⇥⇥⇥⇥↲___⇥_⇥_⇥_⇥
↲___⇥⇥____⇥↲___⇥⇥__⇥_⇥↲___⇥⇥_⇥__⇥↲___⇥⇥_⇥⇥⇥⇥↲___⇥⇥⇥_⇥_⇥↲↲___⇥↲_↲_↲⇥_⇥↲___
_↲⇥⇥⇥⇥__⇥↲⇥_↲↲_↲_⇥↲↲__↲↲⇥__↲↲_↲↲↲__⇥↲____↲⇥⇥⇥_↲_↲⇥___↲⇥↲__↲_↲_↲↲____↲↲↲↲

(_ = space, ⇥ = tab, ↲ = newline)

Here's the script encoded in base64:

CiAgIAogICAgCgkKCSAgICAgCiAgIAkgICAgIAkKICAgCSAgIAkgCQogICAJICAJICAJCiAgIAkg
IAkJCQkKICAgCSAJIAkgCQogICAJCSAgICAJCiAgIAkJICAJIAkKICAgCQkgCSAgCQogICAJCSAJ
CQkJCiAgIAkJCSAJIAkKCiAgIAkKIAogCgkgCQogICAgCgkJCQkgIAkKCSAKCiAKIAkKCiAgCgoJ
ICAKCiAKCgogIAkKICAgIAoJCQkgCiAKCSAgIAoJCiAgCiAKIAoKICAgIAoKCgo=

And here's the program written in visible assembler-like form:

ioloop: charin  0
        push    0, 'A', 'E', 'I', 'O', 'U', 'a', 'e', 'i', 'o', 'u'
ckloop: dup
        jz      out
        get     0
        sub
        jz      skip
        jump    ckloop
skip:   jz      ioloop
        jump    skip
out:    get     0
        dup
        jz      done
        charout
        jump    ioloop
done:   exit

SED (10 distinct bytes, 13 total)

s/[aeIou]//gI

Sample usage:

echo The quick brown fox jumps over the lazy dOg. | sed -e s/[aeIou]//gI

outputs:

Th qck brwn fx jmps vr th lzy dg.