I would like to ask you for help on following issue with my website.
I am running a website for a couple of years now and gained PR4 and good rankings for relevant keywords.
At the beginning of this month I noticed that the website doesn't come up in the search results (Google) as before. I checked Google webmaster tools statistics (9th Aug) and they were showing Web crawl error. It was 4xx error and it was appearing there for couple of days, but 7 days ago it disappear and was not showing anymore which is good. I suspect that the server I host the website on had some troubles and was down for a while. It seems like Google was crawling the website at that time.
The problem is that my homepage is since then removed from the cache and it doesn't come up among indexed pages of the website "site:" (I have about 100 pages indexed but no homepage). As addition to this, PR of my homepage went down from 4 to 0!
Googlebot last successfully accessed my home page on Aug 4, 2008 but since then, even though I resubmitted the sitemap, didn't come.
Any suggestions please? It is very incovenient having the homepage removed from Google for such a long time (Yahoo and MSN are OK) just because the server went down once for a short time.