Just a little idea of how to make look Slovio a little less uggly and more regular (but somewhat natural in the same time).

The apostroph method is used instead of X-method: nas', tutc'as etc.

Words should be reconstructed to their original form whenever it's possible: z'ena etc.

All the endings accord to a simple scheme:

noun:	(the pure stem ending in a consonant, a, e, or o)
noun, plural	-(i)s
noun, objective case	-(j)u
noun, objective case, plural	-(j)us
adjective	-(i)j
adjective, possessive	-(i)voj
adverb	-(i)jo (i.e. adjective + -o)
verb, infinitive/present	-(i)t
verb, future	budet + verb
verb, conditional	bi + verb
verb, imperative	-(i)jte

etc.

As you see all the endings/suffixes start with either (i) or (j). Their use is simple: you should add i when stem ends in a consonant (to avoid to consonants coming together: domis, z'enas), and you should add j after stems ending in a vowel (to avoid collision of two vowels: domu, z'enaju).

Note that:

- 'objective case' ending is the one really existing in natural languages (and looks much better with plural ending);
- possessive adjectives have ending of adjectives (and even possessive pronouns moj, tvojsvoj have adjective ending);
- the adjective ending of zero-ending nouns is the one used three major Slavic languages for masculine nominative: -ij;

Example text:

Novij mez'unarodnij Mova! C'o je Slovio? Slovio je novij mez'unarodnij mova ktor rozumet tristo milion ludis na celij zemla. Vi moz'et upotrebit Slovio dla govorenie so tristo milion ludis od Praga do Vladivostok; od Sankt-Peterburg c'rez Vars'ava do Varna; od Sredzemij More do Tihij Okean. Slovio imat prostij logikij gramatia i Slovio je idealij mova dla tutdenij ludis. Uc'ijte Slovio tutc'as!

-- It doesn't look half as scary as the current version of Slovio. (I used word mova to distinguish word for "language" from word for "tongue" (and to have verb like movat -- "to speak (a language)"); other option was to use govor).

Example 2 (from Flag of Lithuania):

Flag Litvaju je horizontij trikolor z'oltij, zelenij i c'ervenij kolorus. Flag bil prinanij 20 marcu 1989 posle vihodinie Litvaju iz Sovetij Sojuz. Pred toj prinanie, flag bil upotrebinij od 1918 do 1940, gda Litva bil okupacianij jedin-posle-inij Nacistij Germaniaju i Sovetij Sojuzu. Od 1945 do 1989 sovetij litvaj flag bil skladanij iz obic'ij dla sovetij republikas c'ervenij flag so ime republikaju, a posle hvila to bil zmeninij do vis'e poznalij flag so belij i zelenij c'ertas u niz. Najvis'e nedavnij zmeninie flagu bil v 2004, gda delinie bokus bil zmeninij od 1:2 do 3:5 ...