Looks very nice!
Though your drop menu is completely relying on javascript, which will cause some accessibility issues for people who have no javascript support in their browser(and for search engines)
I lovelovelovelovelovelove it.
My problem is that the favicon doesn't match up with your site's logo. The other thing is that the title would be better suited to actually be in title case and follow English spacing rules rather than French ones; i.e., "WebAndPeople: Professional Web Design". I'm not sure whether the French spacing was a conscious choice, but it definitely should be titling case.
You might get someone to proff read your copy. In some places it's awkward.
example:
"This is the most important evaluation parameter. We do not offer the most cheap solution, but we are ready to justify each forint."
to:
"This is the most important evaluation parameter. We do not offer the cheapest solution, but we are ready to justify each forint."
forint? is this a typo or are you based in Hungary? Since the prices you list seem to be in U.S. dollars, if this isn't a typo I would rewrite that line.